| City | State | Area Code(s) |
| Odebolt | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Odell | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Odell | NE | Nebraska Area Code(s): 308 402 |
| Odell | OR | Oregon Area Code(s): 503 541 |
| Odell | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Odem | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Oden | AR | Arkansas Area Code(s): 479 501 870 |
| Oden | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Odenton | MD | Maryland Area Code(s): 301 410 |
| Odenville | AL | Alabama Area Code(s): 205 251 256 334 |
| Odessa | DE | Delaware Area Code(s): 302 |
| Odessa | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Odessa | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Odessa | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Odessa | NE | Nebraska Area Code(s): 308 402 |
| Odessa | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Odessa | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Odessa | WA | Washington Area Code(s): 206 253 360 425 509 |
| Odin | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Odin | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Odon | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Odonnell | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Odum | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Oelrichs | SD | South Dakota Area Code(s): 605 |
| Oelwein | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Offerle | KS | Kansas Area Code(s): 316 620 785 913 |
| Offerman | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Offutt A F B | NE | Nebraska Area Code(s): 308 402 |
| Ogallah | KS | Kansas Area Code(s): 316 620 785 913 |
| Ogallala | NE | Nebraska Area Code(s): 308 402 |
| Ogden | AR | Arkansas Area Code(s): 479 501 870 |
| Ogden | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Ogden | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Ogden | KS | Kansas Area Code(s): 316 620 785 913 |
| Ogden | UT | Utah Area Code(s): 435 801 |
| Ogdensburg | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Ogdensburg | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Ogdensburg | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Ogema | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Ogema | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Ogilvie | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Oglala | SD | South Dakota Area Code(s): 605 |
| Oglesby | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oglesby | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Oglethorpe | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Ogunquit | ME | Maine Area Code(s): 207 |
| Ohatchee | AL | Alabama Area Code(s): 205 251 256 334 |
| Ohio City | CO | Colorado Area Code(s): 303 719 970 |
| Ohio City | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Ohio | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Ohiopyle | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Ohiowa | NE | Nebraska Area Code(s): 308 402 |
| Ohley | WV | West Virginia Area Code(s): 304 |
| Ohlman | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oil City | LA | Louisiana Area Code(s): 225 318 337 504 985 |
| Oil City | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Oil Springs | KY | Kentucky Area Code(s): 270 502 606 859 |
| Oil Trough | AR | Arkansas Area Code(s): 479 501 870 |
| Oilmont | MT | Montana Area Code(s): 406 |
| Oilton | OK | Oklahoma Area Code(s): 405 580 918 |
| Oilton | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Oilville | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Ojai | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Ojibwa | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Ojo Caliente | NM | New Mexico Area Code(s): 505 |
| Ojo Feliz | NM | New Mexico Area Code(s): 505 |
| Okabena | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Okahumpka | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Okanogan | WA | Washington Area Code(s): 206 253 360 425 509 |
| Okarche | OK | Oklahoma Area Code(s): 405 580 918 |
| Okatie | SC | South Carolina Area Code(s): 803 843 864 |
| Okaton | SD | South Dakota Area Code(s): 605 |
| Okauchee | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Okawville | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Okay | OK | Oklahoma Area Code(s): 405 580 918 |
| Okeana | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Okeechobee | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Okeene | OK | Oklahoma Area Code(s): 405 580 918 |
| Okemah | OK | Oklahoma Area Code(s): 405 580 918 |
| Okemos | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Oketo | KS | Kansas Area Code(s): 316 620 785 913 |
| Oklahoma City | OK | Oklahoma Area Code(s): 405 580 918 |
| Oklaunion | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Oklee | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Okmulgee | OK | Oklahoma Area Code(s): 405 580 918 |
| Okoboji | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Okolona | AR | Arkansas Area Code(s): 479 501 870 |
| Okolona | MS | Mississippi Area Code(s): 228 601 662 |
| Okolona | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Okreek | SD | South Dakota Area Code(s): 605 |
| Oktaha | OK | Oklahoma Area Code(s): 405 580 918 |
| Ola | AR | Arkansas Area Code(s): 479 501 870 |
| Ola | ID | Idaho Area Code(s): 208 |
| Olalla | WA | Washington Area Code(s): 206 253 360 425 509 |
| Olamon | ME | Maine Area Code(s): 207 |
| Olancha | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Olanta | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Olanta | SC | South Carolina Area Code(s): 803 843 864 |
| Olar | SC | South Carolina Area Code(s): 803 843 864 |
| Olathe | CO | Colorado Area Code(s): 303 719 970 |
| Olathe | KS | Kansas Area Code(s): 316 620 785 913 |
| Olaton | KY | Kentucky Area Code(s): 270 502 606 859 |
| Olcott | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Old Appleton | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Old Bethpage | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Old Bridge | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Old Chatham | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Old Fields | WV | West Virginia Area Code(s): 304 |
| Old Forge | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Old Forge | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Old Fort | NC | North Carolina Area Code(s): 252 336 704 828 910 919 |
| Old Fort | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Old Glory | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Old Greenwich | CT | Connecticut Area Code(s): 203 860 |
| Old Harbor | AK | Alaska Area Code(s): 907 |
| Old Hickory | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Old Lyme | CT | Connecticut Area Code(s): 203 860 |
| Old Mission | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Old Monroe | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Old Mystic | CT | Connecticut Area Code(s): 203 860 |
| Old Ocean | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Old Orchard Beach | ME | Maine Area Code(s): 207 |
| Old Saybrook | CT | Connecticut Area Code(s): 203 860 |
| Old Station | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Old Town | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Old Town | ME | Maine Area Code(s): 207 |
| Old Washington | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Old Westbury | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Old Zionsville | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Olden | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Oldenburg | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Oldfield | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Oldfort | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Oldham | SD | South Dakota Area Code(s): 605 |
| Oldhams | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Olds | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Oldsmar | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Oldtown | ID | Idaho Area Code(s): 208 |
| Oldtown | MD | Maryland Area Code(s): 301 410 |
| Oldwick | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Olean | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Olean | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Olema | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Oley | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Olga | WA | Washington Area Code(s): 206 253 360 425 509 |
| Olin | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Olin | NC | North Carolina Area Code(s): 252 336 704 828 910 919 |
| Olive Branch | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Olive Branch | MS | Mississippi Area Code(s): 228 601 662 |
| Olive Hill | KY | Kentucky Area Code(s): 270 502 606 859 |
| Olive | MT | Montana Area Code(s): 406 |
| Olivebridge | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oliveburg | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Olivehill | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Olivehurst | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Oliver Springs | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Oliver | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Oliver | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Olivet | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Olivet | SD | South Dakota Area Code(s): 605 |
| Olivia | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Olivia | NC | North Carolina Area Code(s): 252 336 704 828 910 919 |
| Olla | LA | Louisiana Area Code(s): 225 318 337 504 985 |
| Ollie | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Olmito | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Olmitz | KS | Kansas Area Code(s): 316 620 785 913 |
| Olmstead | KY | Kentucky Area Code(s): 270 502 606 859 |
| Olmsted Falls | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Olmsted | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Olmstedville | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Olney Springs | CO | Colorado Area Code(s): 303 719 970 |
| Olney | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Olney | MD | Maryland Area Code(s): 301 410 |
| Olney | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Olney | MT | Montana Area Code(s): 406 |
| Olney | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Olpe | KS | Kansas Area Code(s): 316 620 785 913 |
| Olsburg | KS | Kansas Area Code(s): 316 620 785 913 |
| Olton | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Olustee | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Olustee | OK | Oklahoma Area Code(s): 405 580 918 |
| Olympia Fields | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Olympia | KY | Kentucky Area Code(s): 270 502 606 859 |
| Olympia | WA | Washington Area Code(s): 206 253 360 425 509 |
| Olympic Valley | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Olyphant | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Omaha | AR | Arkansas Area Code(s): 479 501 870 |
| Omaha | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Omaha | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Omaha | NE | Nebraska Area Code(s): 308 402 |
| Omaha | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Omak | WA | Washington Area Code(s): 206 253 360 425 509 |
| Omar | WV | West Virginia Area Code(s): 304 |
| Omega | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Omega | OK | Oklahoma Area Code(s): 405 580 918 |
| Omena | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Omer | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Omro | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Ona | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Ona | WV | West Virginia Area Code(s): 304 |
| Onaga | KS | Kansas Area Code(s): 316 620 785 913 |
| Onaka | SD | South Dakota Area Code(s): 605 |
| Onalaska | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Onalaska | WA | Washington Area Code(s): 206 253 360 425 509 |
| Onalaska | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Onamia | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Onancock | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Onarga | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Onawa | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Onaway | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Oneco | CT | Connecticut Area Code(s): 203 860 |
| Oneco | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Onego | WV | West Virginia Area Code(s): 304 |
| Oneida | AR | Arkansas Area Code(s): 479 501 870 |
| Oneida | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oneida | KS | Kansas Area Code(s): 316 620 785 913 |
| Oneida | KY | Kentucky Area Code(s): 270 502 606 859 |
| Oneida | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oneida | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Oneida | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Oneida | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Oneill | NE | Nebraska Area Code(s): 308 402 |
| Onekama | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Onemo | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Oneonta | AL | Alabama Area Code(s): 205 251 256 334 |
| Oneonta | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Ong | NE | Nebraska Area Code(s): 308 402 |
| Onia | AR | Arkansas Area Code(s): 479 501 870 |
| Onida | SD | South Dakota Area Code(s): 605 |
| Onley | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Only | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Ono | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Onondaga | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Onset | MA | Massachusetts Area Code(s): 413 508 617 781 978 |
| Onslow | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Onsted | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Ontario Center | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Ontario | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Ontario | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Ontario | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Ontario | OR | Oregon Area Code(s): 503 541 |
| Ontario | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Ontonagon | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Onward | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Onyx | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Ookala | HI | Hawaii Area Code(s): 808 |
| Oolitic | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Oologah | OK | Oklahoma Area Code(s): 405 580 918 |
| Ooltewah | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Oostburg | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Opa Locka | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Opal | WY | Wyoming Area Code(s): 208 307 |
| Opdyke | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Opelika | AL | Alabama Area Code(s): 205 251 256 334 |
| Opelousas | LA | Louisiana Area Code(s): 225 318 337 504 985 |
| Opheim | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Opheim | MT | Montana Area Code(s): 406 |
| Ophelia | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Ophir | CO | Colorado Area Code(s): 303 719 970 |
| Ophir | KY | Kentucky Area Code(s): 270 502 606 859 |
| Ophir | OR | Oregon Area Code(s): 503 541 |
| Opolis | KS | Kansas Area Code(s): 316 620 785 913 |
| Opp | AL | Alabama Area Code(s): 205 251 256 334 |
| Oquawka | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oquossoc | ME | Maine Area Code(s): 207 |
| Ora | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Oracle | AZ | Arizona Area Code(s): 480 520 602 623 928 |
| Oradell | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Oral | SD | South Dakota Area Code(s): 605 |
| Oran | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Oran | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Orange Beach | AL | Alabama Area Code(s): 205 251 256 334 |
| Orange City | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Orange City | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Orange Cove | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orange Grove | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Orange Lake | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Orange Park | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Orange Springs | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Orange | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orange | CT | Connecticut Area Code(s): 203 860 |
| Orange | MA | Massachusetts Area Code(s): 413 508 617 781 978 |
| Orange | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Orange | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Orange | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Orangeburg | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Orangeburg | SC | South Carolina Area Code(s): 803 843 864 |
| Orangefield | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Orangevale | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orangeville | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Orangeville | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Orangeville | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Orangeville | UT | Utah Area Code(s): 435 801 |
| Oraville | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Orbisonia | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Orcas | WA | Washington Area Code(s): 206 253 360 425 509 |
| Orchard Hill | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Orchard Park | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Orchard | CO | Colorado Area Code(s): 303 719 970 |
| Orchard | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Orchard | NE | Nebraska Area Code(s): 308 402 |
| Orchard | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Ord | NE | Nebraska Area Code(s): 308 402 |
| Orderville | UT | Utah Area Code(s): 435 801 |
| Ordinary | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Ordway | CO | Colorado Area Code(s): 303 719 970 |
| Ore City | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Oreana | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Orefield | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Oregon City | OR | Oregon Area Code(s): 503 541 |
| Oregon House | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Oregon | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oregon | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Oregon | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Oregon | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Oregonia | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Oreland | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Orem | UT | Utah Area Code(s): 435 801 |
| Orestes | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Orford | NH | New Hampshire Area Code(s): 603 |
| Orfordville | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Organ | NM | New Mexico Area Code(s): 505 |
| Orgas | WV | West Virginia Area Code(s): 304 |
| Orick | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orient | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Orient | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Orient | ME | Maine Area Code(s): 207 |
| Orient | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Orient | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Orient | SD | South Dakota Area Code(s): 605 |
| Orient | WA | Washington Area Code(s): 206 253 360 425 509 |
| Oriental | NC | North Carolina Area Code(s): 252 336 704 828 910 919 |
| Orinda | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orion | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oriska | ND | North Dakota Area Code(s): 701 |
| Oriskany Falls | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oriskany | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oriskany | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Orkney Springs | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Orla | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Orland Park | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Orland | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orland | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Orland | ME | Maine Area Code(s): 207 |
| Orlando | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Orlando | KY | Kentucky Area Code(s): 270 502 606 859 |
| Orlando | OK | Oklahoma Area Code(s): 405 580 918 |
| Orlando | WV | West Virginia Area Code(s): 304 |
| Orlean | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Orleans | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orleans | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Orleans | MA | Massachusetts Area Code(s): 413 508 617 781 978 |
| Orleans | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Orleans | NE | Nebraska Area Code(s): 308 402 |
| Orleans | VT | Vermont Area Code(s): 802 |
| Orlinda | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Orma | WV | West Virginia Area Code(s): 304 |
| Ormond Beach | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Ormsby | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Oro Grande | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orocovis | PR | Puerto Rico Area Code(s): 787 |
| Orofino | ID | Idaho Area Code(s): 208 |
| Orogrande | NM | New Mexico Area Code(s): 505 |
| Orondo | WA | Washington Area Code(s): 206 253 360 425 509 |
| Orono | ME | Maine Area Code(s): 207 |
| Oronoco | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Oronogo | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Orosi | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Orovada | NV | Nevada Area Code(s): 702 775 |
| Oroville | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Oroville | WA | Washington Area Code(s): 206 253 360 425 509 |
| Orr | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Orrick | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Orrin | ND | North Dakota Area Code(s): 701 |
| Orrington | ME | Maine Area Code(s): 207 |
| Orrs Island | ME | Maine Area Code(s): 207 |
| Orrstown | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Orrtanna | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Orrum | NC | North Carolina Area Code(s): 252 336 704 828 910 919 |
| Orrville | AL | Alabama Area Code(s): 205 251 256 334 |
| Orrville | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Orson | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Orting | WA | Washington Area Code(s): 206 253 360 425 509 |
| Ortley | SD | South Dakota Area Code(s): 605 |
| Ortonville | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Ortonville | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Orviston | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Orwell | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Orwell | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Orwell | VT | Vermont Area Code(s): 802 |
| Orwigsburg | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Osage Beach | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Osage City | KS | Kansas Area Code(s): 316 620 785 913 |
| Osage | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Osage | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Osage | OK | Oklahoma Area Code(s): 405 580 918 |
| Osage | WV | West Virginia Area Code(s): 304 |
| Osage | WY | Wyoming Area Code(s): 208 307 |
| Osakis | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Osawatomie | KS | Kansas Area Code(s): 316 620 785 913 |
| Osborn | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Osborne | KS | Kansas Area Code(s): 316 620 785 913 |
| Osburn | ID | Idaho Area Code(s): 208 |
| Oscar | LA | Louisiana Area Code(s): 225 318 337 504 985 |
| Oscar | OK | Oklahoma Area Code(s): 405 580 918 |
| Osceola Mills | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Osceola | AR | Arkansas Area Code(s): 479 501 870 |
| Osceola | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Osceola | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Osceola | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Osceola | NE | Nebraska Area Code(s): 308 402 |
| Osceola | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Osceola | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Osco | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oscoda | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Osgood | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Osgood | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Oshkosh | NE | Nebraska Area Code(s): 308 402 |
| Oshkosh | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Oshtemo | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Oskaloosa | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Oskaloosa | KS | Kansas Area Code(s): 316 620 785 913 |
| Oslo | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Osmond | NE | Nebraska Area Code(s): 308 402 |
| Osnabrock | ND | North Dakota Area Code(s): 701 |
| Osprey | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Osseo | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Osseo | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Osseo | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Ossian | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Ossian | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Ossineke | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Ossining | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Ossipee | NH | New Hampshire Area Code(s): 603 |
| Osteen | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Osterburg | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Osterville | MA | Massachusetts Area Code(s): 413 508 617 781 978 |
| Ostrander | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Ostrander | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Oswegatchie | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oswego | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Oswego | KS | Kansas Area Code(s): 316 620 785 913 |
| Oswego | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Osyka | MS | Mississippi Area Code(s): 228 601 662 |
| Otego | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Othello | WA | Washington Area Code(s): 206 253 360 425 509 |
| Otho | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Otis Orchards | WA | Washington Area Code(s): 206 253 360 425 509 |
| Otis | CO | Colorado Area Code(s): 303 719 970 |
| Otis | KS | Kansas Area Code(s): 316 620 785 913 |
| Otis | LA | Louisiana Area Code(s): 225 318 337 504 985 |
| Otis | MA | Massachusetts Area Code(s): 413 508 617 781 978 |
| Otis | OR | Oregon Area Code(s): 503 541 |
| Otisco | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Otisville | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Otisville | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Otley | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Oto | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Otoe | NE | Nebraska Area Code(s): 308 402 |
| Otsego | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Ottawa Lake | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Ottawa | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Ottawa | KS | Kansas Area Code(s): 316 620 785 913 |
| Ottawa | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Ottawa | WV | West Virginia Area Code(s): 304 |
| Otter Creek | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Otter Lake | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Otter Rock | OR | Oregon Area Code(s): 503 541 |
| Otter | MT | Montana Area Code(s): 406 |
| Otterbein | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Ottertail | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Otterville | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Ottine | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Otto | NC | North Carolina Area Code(s): 252 336 704 828 910 919 |
| Otto | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Otto | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Otto | WY | Wyoming Area Code(s): 208 307 |
| Ottosen | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Ottoville | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Ottsville | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Ottumwa | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Otway | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Otwell | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Ouaquaga | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Ouray | CO | Colorado Area Code(s): 303 719 970 |
| Outing | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Outlook | MT | Montana Area Code(s): 406 |
| Outlook | WA | Washington Area Code(s): 206 253 360 425 509 |
| Ouzinkie | AK | Alaska Area Code(s): 907 |
| Ovalo | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Ovando | MT | Montana Area Code(s): 406 |
| Ovapa | WV | West Virginia Area Code(s): 304 |
| Overbrook | KS | Kansas Area Code(s): 316 620 785 913 |
| Overbrook | OK | Oklahoma Area Code(s): 405 580 918 |
| Overgaard | AZ | Arizona Area Code(s): 480 520 602 623 928 |
| Overland Park | KS | Kansas Area Code(s): 316 620 785 913 |
| Overpeck | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Overton | NE | Nebraska Area Code(s): 308 402 |
| Overton | NV | Nevada Area Code(s): 702 775 |
| Overton | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Ovett | MS | Mississippi Area Code(s): 228 601 662 |
| Ovid | CO | Colorado Area Code(s): 303 719 970 |
| Ovid | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Ovid | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oviedo | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Owaneco | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Owanka | SD | South Dakota Area Code(s): 605 |
| Owasso | OK | Oklahoma Area Code(s): 405 580 918 |
| Owatonna | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Owego | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Owen | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Owendale | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Owens Cross Roads | AL | Alabama Area Code(s): 205 251 256 334 |
| Owensboro | KY | Kentucky Area Code(s): 270 502 606 859 |
| Owensburg | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Owensville | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Owensville | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Owensville | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Owenton | KY | Kentucky Area Code(s): 270 502 606 859 |
| Owings Mills | MD | Maryland Area Code(s): 301 410 |
| Owings | MD | Maryland Area Code(s): 301 410 |
| Owingsville | KY | Kentucky Area Code(s): 270 502 606 859 |
| Owls Head | ME | Maine Area Code(s): 207 |
| Owls Head | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Owosso | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Owyhee | NV | Nevada Area Code(s): 702 775 |
| Oxbow | ME | Maine Area Code(s): 207 |
| Oxbow | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oxbow | OR | Oregon Area Code(s): 503 541 |
| Oxford Junction | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Oxford | AL | Alabama Area Code(s): 205 251 256 334 |
| Oxford | AR | Arkansas Area Code(s): 479 501 870 |
| Oxford | CT | Connecticut Area Code(s): 203 860 |
| Oxford | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Oxford | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Oxford | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Oxford | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Oxford | KS | Kansas Area Code(s): 316 620 785 913 |
| Oxford | MA | Massachusetts Area Code(s): 413 508 617 781 978 |
| Oxford | MD | Maryland Area Code(s): 301 410 |
| Oxford | ME | Maine Area Code(s): 207 |
| Oxford | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Oxford | MS | Mississippi Area Code(s): 228 601 662 |
| Oxford | NC | North Carolina Area Code(s): 252 336 704 828 910 919 |
| Oxford | NE | Nebraska Area Code(s): 308 402 |
| Oxford | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Oxford | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oxford | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Oxford | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Oxford | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Oxly | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Oxnard | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Oxon Hill | MD | Maryland Area Code(s): 301 410 |
| Oyens | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Oyster Bay | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Oyster | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Oysterville | WA | Washington Area Code(s): 206 253 360 425 509 |
| Ozan | AR | Arkansas Area Code(s): 479 501 870 |
| Ozark | AL | Alabama Area Code(s): 205 251 256 334 |
| Ozark | AR | Arkansas Area Code(s): 479 501 870 |
| Ozark | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Ozark | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Ozawkie | KS | Kansas Area Code(s): 316 620 785 913 |
| Ozona | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Ozona | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Ozone Park | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Ozone | AR | Arkansas Area Code(s): 479 501 870 |
| Paauilo | HI | Hawaii Area Code(s): 808 |
| Pablo | MT | Montana Area Code(s): 406 |
| Pace | MS | Mississippi Area Code(s): 228 601 662 |
| Pachuta | MS | Mississippi Area Code(s): 228 601 662 |
| Pacific Beach | WA | Washington Area Code(s): 206 253 360 425 509 |
| Pacific City | OR | Oregon Area Code(s): 503 541 |
| Pacific Grove | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Pacific Junction | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Pacific Palisades | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Pacific | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Pacific | WA | Washington Area Code(s): 206 253 360 425 509 |
| Pacifica | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Packwaukee | WI | Wisconsin Area Code(s): 262 414 608 715 920 |
| Packwood | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Packwood | WA | Washington Area Code(s): 206 253 360 425 509 |
| Pacoima | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Pacolet Mills | SC | South Carolina Area Code(s): 803 843 864 |
| Pacolet | SC | South Carolina Area Code(s): 803 843 864 |
| Paden City | WV | West Virginia Area Code(s): 304 |
| Paden | OK | Oklahoma Area Code(s): 405 580 918 |
| Padroni | CO | Colorado Area Code(s): 303 719 970 |
| Paducah | KY | Kentucky Area Code(s): 270 502 606 859 |
| Paducah | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Paeonian Springs | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Page | AZ | Arizona Area Code(s): 480 520 602 623 928 |
| Page | ND | North Dakota Area Code(s): 701 |
| Page | NE | Nebraska Area Code(s): 308 402 |
| Page | WV | West Virginia Area Code(s): 304 |
| Pageland | SC | South Carolina Area Code(s): 803 843 864 |
| Pageton | WV | West Virginia Area Code(s): 304 |
| Pago Pago | AS | American Samoa Area Code(s): 000 |
| Pagosa Springs | CO | Colorado Area Code(s): 303 719 970 |
| Paguate | NM | New Mexico Area Code(s): 505 |
| Pahala | HI | Hawaii Area Code(s): 808 |
| Pahoa | HI | Hawaii Area Code(s): 808 |
| Pahokee | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Pahrump | NV | Nevada Area Code(s): 702 775 |
| Paia | HI | Hawaii Area Code(s): 808 |
| Paicines | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Paige | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Paincourtville | LA | Louisiana Area Code(s): 225 318 337 504 985 |
| Painesdale | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Painesville | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Paint Bank | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Paint Lick | KY | Kentucky Area Code(s): 270 502 606 859 |
| Paint Rock | AL | Alabama Area Code(s): 205 251 256 334 |
| Paint Rock | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Painted Post | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Painter | VA | Virginia Area Code(s): 276 434 540 703 757 804 |
| Painton | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Paintsville | KY | Kentucky Area Code(s): 270 502 606 859 |
| Paisley | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Paisley | OR | Oregon Area Code(s): 503 541 |
| Pala | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Palacios | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Palatine Bridge | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Palatine | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Palatka | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palau | PW | Republic of Palau Area Code(s): 000 |
| Palco | KS | Kansas Area Code(s): 316 620 785 913 |
| Palenville | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Palermo | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Palermo | ME | Maine Area Code(s): 207 |
| Palermo | ND | North Dakota Area Code(s): 701 |
| Palestine | AR | Arkansas Area Code(s): 479 501 870 |
| Palestine | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Palestine | OH | Ohio Area Code(s): 216 330 419 440 513 614 740 859 937 |
| Palestine | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Palestine | WV | West Virginia Area Code(s): 304 |
| Palisade | CO | Colorado Area Code(s): 303 719 970 |
| Palisade | MN | Minnesota Area Code(s): 218 320 507 612 651 763 952 |
| Palisade | NE | Nebraska Area Code(s): 308 402 |
| Palisades Park | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Palisades | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Palisades | WA | Washington Area Code(s): 206 253 360 425 509 |
| Pall Mall | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Palm Bay | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palm Beach Gardens | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palm Beach | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palm City | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palm Coast | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palm Desert | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Palm Harbor | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palm Springs | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Palm | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Palmdale | CA | California Area Code(s): 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 |
| Palmdale | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palmer Lake | CO | Colorado Area Code(s): 303 719 970 |
| Palmer | AK | Alaska Area Code(s): 907 |
| Palmer | IA | Iowa Area Code(s): 319 515 563 641 712 |
| Palmer | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Palmer | KS | Kansas Area Code(s): 316 620 785 913 |
| Palmer | MA | Massachusetts Area Code(s): 413 508 617 781 978 |
| Palmer | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Palmer | NE | Nebraska Area Code(s): 308 402 |
| Palmer | PR | Puerto Rico Area Code(s): 787 |
| Palmer | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Palmer | TX | Texas Area Code(s): 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979 |
| Palmerdale | AL | Alabama Area Code(s): 205 251 256 334 |
| Palmersville | TN | Tennessee Area Code(s): 423 615 731 865 901 931 |
| Palmerton | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |
| Palmetto | FL | Florida Area Code(s): 239 305 321 352 386 407 561 727 772 813 850 863 904 941 954 |
| Palmetto | GA | Georgia Area Code(s): 229 404 478 706 770 912 |
| Palmetto | LA | Louisiana Area Code(s): 225 318 337 504 985 |
| Palms | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Palmyra | IL | Illinois Area Code(s): 217 309 312 618 630 708 773 815 847 |
| Palmyra | IN | Indiana Area Code(s): 219 260 317 574 765 812 |
| Palmyra | ME | Maine Area Code(s): 207 |
| Palmyra | MI | Michigan Area Code(s): 231 248 269 313 517 586 616 734 810 906 989 |
| Palmyra | MO | Missouri Area Code(s): 314 417 573 636 660 816 |
| Palmyra | NE | Nebraska Area Code(s): 308 402 |
| Palmyra | NJ | New Jersey Area Code(s): 201 609 732 856 908 973 |
| Palmyra | NY | New York Area Code(s): 212 315 516 518 585 607 631 716 718 845 914 |
| Palmyra | PA | Pennsylvania Area Code(s): 215 412 570 610 717 724 814 |