| Area Code | Region | Description |
| 52 55 | MX | Mexico: Mexico City area (country code + city code) |
| 201 | NJ | N New Jersey: Jersey City, Hackensack (see split 973, overlay 551) |
| 202 | DC | Washington, D.C. |
| 203 | CT | Connecticut: Fairfield County and New Haven County; Bridgeport, New Haven (see 860) |
| 204 | MB | Canada: Manitoba |
| 205 | AL | Central Alabama (including Birmingham; excludes the southeastern corner of Alabama and the deep south; see splits 256 and 334) |
| 206 | WA | W Washington state: Seattle and Bainbridge Island (see splits 253, 360, 425; overlay 564) |
| 207 | ME | Maine |
| 208 | ID | Idaho |
| 209 | CA | Cent. California: Stockton (see split 559) |
| 210 | TX | S Texas: San Antonio (see also splits 830, 956) |
| 211 | -- | Local community info / referral services |
| 212 | NY | New York City, New York (Manhattan; see 646, 718) |
| 213 | CA | S California: Los Angeles (see 310, 323, 626, 818) |
| 214 | TX | Texas: Dallas Metro (overlays 469/972) |
| 215 | PA | SE Pennsylvania: Philadelphia (see overlays 267) |
| 216 | OH | Cleveland (see splits 330, 440) |
| 217 | IL | Cent. Illinois: Springfield |
| 218 | MN | N Minnesota: Duluth |
| 219 | IN | NW Indiana: Gary (see split 574, 260) |
| 224 | IL | Northern NE Illinois: Evanston, Waukegan, Northbrook (overlay on 847, eff 1/5/02) |
| 225 | LA | Louisiana: Baton Rouge, New Roads, Donaldsonville, Albany, Gonzales, Greensburg, Plaquemine, Vacherie (split from 504) |
| 226 | ON | Canada: SW Ontario: Windsor (overlaid on 519; eff 6/06) |
| 228 | MS | S Mississippi (coastal areas, Biloxi, Gulfport; split from 601) |
| 229 | GA | SW Georgia: Albany (split from 912; see also 478; perm 8/1/00) |
| 231 | MI | W Michigan: Northwestern portion of lower Peninsula; Traverse City, Muskegon, Cheboygan, Alanson |
| 234 | OH | NE Ohio: Canton, Akron (overlaid on 330; perm 10/30/00) |
| 236 | VA | Virginia (region unknown) / Unassigned? |
| 239 | FL | Florida (Lee, Collier, and Monroe Counties, excl the Keys; see 305; eff 3/11/02; mand 3/11/03) |
| 240 | MD | W Maryland: Silver Spring, Frederick, Gaithersburg (overlay, see 301) |
| 242 | -- | Bahamas |
| 246 | -- | Barbados |
| 248 | MI | Michigan: Oakland County, Pontiac (split from 810; see overlay 947) |
| 250 | BC | Canada: British Columbia (see 604) |
| 251 | AL | S Alabama: Mobile and coastal areas, Jackson, Evergreen, Monroeville (split from 334, eff 6/18/01; see also 205, 256) |
| 252 | NC | E North Carolina (Rocky Mount; split from 919) |
| 253 | WA | Washington: South Tier - Tacoma, Federal Way (split from 206, see also 425; overlay 564) |
| 254 | TX | Central Texas (Waco, Stephenville; split, see 817, 940) |
| 256 | AL | E and N Alabama (Huntsville, Florence, Gadsden; split from 205; see also 334) |
| 260 | IN | NE Indiana: Fort Wayne (see 219) |
| 262 | WI | SE Wisconsin: counties of Kenosha, Ozaukee, Racine, Walworth, Washington, Waukesha (split from 414) |
| 264 | -- | Anguilla (split from 809) |
| 267 | PA | SE Pennsylvania: Philadelphia (see 215) |
| 268 | -- | Antigua and Barbuda (split from 809) |
| 269 | MI | SW Michigan: Kalamazoo, Saugatuck, Hastings, Battle Creek, Sturgis to Lake Michigan (split from 616) |
| 270 | KY | W Kentucky: Bowling Green, Paducah (split from 502) |
| 276 | VA | S and SW Virginia: Bristol, Stuart, Martinsville (split from 540; perm 9/1/01, mand 3/16/02) |
| 278 | MI | Michigan (overlaid on 734, SUSPENDED) |
| 281 | TX | Texas: Houston Metro (split 713; overlay 832) |
| 283 | OH | SW Ohio: Cincinnati (cancelled: overlaid on 513) |
| 284 | -- | British Virgin Islands (split from 809) |
| 289 | ON | Canada: S Cent. Ontario: Greater Toronto Area -- Durham, Halton, Hamilton-Wentworth, Niagara, Peel, York, and southern Simcoe County (excluding Toronto -- overlaid on 905, eff 6/9/01) |
| 301 | MD | W Maryland: Silver Spring, Frederick, Camp Springs, Prince George's County (see 240) |
| 302 | DE | Delaware |
| 303 | CO | Central Colorado: Denver (see 970, also 720 overlay) |
| 304 | WV | West Virginia |
| 305 | FL | SE Florida: Miami, the Keys (see 786, 954; 239) |
| 306 | SK | Canada: Saskatchewan |
| 307 | WY | Wyoming |
| 308 | NE | W Nebraska: North Platte |
| 309 | IL | W Cent. Illinois: Peoria |
| 310 | CA | S California: Beverly Hills, West Hollywood, West Los Angeles (see split 562; overlay 424) |
| 311 | -- | Reserved for special applications |
| 312 | IL | Illinois: Chicago (downtown only -- in the loop; see 773; overlay 872) |
| 313 | MI | Michigan: Detroit and suburbs (see 734, overlay 679) |
| 314 | MO | SE Missouri: St Louis city and parts of the metro area only (see 573, 636, overlay 557) |
| 315 | NY | N Cent. New York: Syracuse |
| 316 | KS | S Kansas: Wichita (see split 620) |
| 317 | IN | Cent. Indiana: Indianapolis (see 765) |
| 318 | LA | N Louisiana: Shreveport, Ruston, Monroe, Alexandria (see split 337) |
| 319 | IA | E Iowa: Cedar Rapids (see split 563) |
| 320 | MN | Cent. Minnesota: Saint Cloud (rural Minn, excl St. Paul/Minneapolis) |
| 321 | FL | Florida: Brevard County, Cape Canaveral area; Metro Orlando (split from 407) |
| 323 | CA | S California: Los Angeles (outside downtown: Hollywood; split from 213) |
| 325 | TX | Central Texas: Abilene, Sweetwater, Snyder, San Angelo (split from 915) |
| 330 | OH | NE Ohio: Akron, Canton, Youngstown; Mahoning County, parts of Trumbull/Warren counties (see splits 216, 440, overlay 234) |
| 331 | IL | W NE Illinois, western suburbs of Chicago (part of what used to be 708; overlaid on 630; eff 7/07) |
| 334 | AL | S Alabama: Auburn/Opelika, Montgomery and coastal areas (part of what used to be 205; see also 256, split 251) |
| 336 | NC | Cent. North Carolina: Greensboro, Winston-Salem, High Point (split from 910) |
| 337 | LA | SW Louisiana: Lake Charles, Lafayette (see split 318) |
| 339 | MA | Massachusetts: Boston suburbs, to the south and west (see splits 617, 508; overlaid on 781, eff 5/2/01) |
| 340 | VI | US Virgin Islands (see also 809) |
| 341 | CA | (overlay on 510; SUSPENDED) |
| 345 | -- | Cayman Islands |
| 347 | NY | New York (overlay for 718: NYC area, except Manhattan) |
| 351 | MA | Massachusetts: north of Boston to NH, 508, and 781 (overlaid on 978, eff 4/2/01) |
| 352 | FL | Florida: Gainesville area, Ocala, Crystal River (split from 904) |
| 360 | WA | W Washington State: Olympia, Bellingham (area circling 206, 253, and 425; split from 206; see overlay 564) |
| 361 | TX | S Texas: Corpus Christi (split from 512; eff 2/13/99) |
| 369 | CA | Solano County (perm 12/2/00, mand 6/2/01) |
| 380 | OH | Ohio: Columbus (overlaid on 614; assigned but not in use) |
| 385 | UT | Utah: Salt Lake City Metro (split from 801, eff 3/30/02 POSTPONED; see also 435) |
| 386 | FL | N central Florida: Lake City (split from 904, perm 2/15/01, mand 11/5/01) |
| 401 | RI | Rhode Island |
| 402 | NE | E Nebraska: Omaha, Lincoln |
| 403 | AB | Canada: Southern Alberta (see 780, 867) |
| 404 | GA | N Georgia: Atlanta and suburbs (see overlay 678, split 770) |
| 405 | OK | W Oklahoma: Oklahoma City (see 580) |
| 406 | MT | Montana |
| 407 | FL | Central Florida: Metro Orlando (see overlay 689, eff 7/02; split 321) |
| 408 | CA | Cent. Coastal California: San Jose (see overlay 669) |
| 409 | TX | SE Texas: Galveston, Port Arthur, Beaumont (splits 936, 979) |
| 410 | MD | E Maryland: Baltimore, Annapolis, Chesapeake Bay area, Ocean City (see 443) |
| 411 | -- | Reserved for special applications |
| 412 | PA | W Pennsylvania: Pittsburgh (see split 724, overlay 878) |
| 413 | MA | W Massachusetts: Springfield |
| 414 | WI | SE Wisconsin: Milwaukee County (see splits 920, 262) |
| 415 | CA | California: San Francisco County and Marin County on the north side of the Golden Gate Bridge, extending north to Sonoma County (see 650) |
| 416 | ON | Canada: S Cent. Ontario: Toronto (see overlay 647, eff 3/5/01) |
| 417 | MO | SW Missouri: Springfield |
| 418 | QC | Canada: NE Quebec: Quebec |
| 419 | OH | NW Ohio: Toledo (see overlay 567, perm 1/1/02) |
| 423 | TN | E Tennessee, except Knoxville metro area: Chattanooga, Bristol, Johnson City, Kingsport, Greeneville (see split 865; part of what used to be 615) |
| 424 | CA | S California: Los Angeles (see split 562; overlaid on 310 mand 7/26/06) |
| 425 | WA | Washington: North Tier - Everett, Bellevue (split from 206, see also 253; overlay 564) |
| 430 | TX | NE Texas: Tyler (overlaid on 903, eff 7/20/02) |
| 432 | TX | W Texas: Big Spring, Midland, Odessa (split from 915, eff 4/5/03) |
| 434 | VA | E Virginia: Charlottesville, Lynchburg, Danville, South Boston, and Emporia (split from 804, eff 6/1/01; see also 757) |
| 435 | UT | Rural Utah outside Salt Lake City metro (see split 801) |
| 438 | QC | Canada: SW Quebec: Montreal city (overlaid on 514, [delayed until 6/06] eff 10/10/03, mand 2/7/04) |
| 440 | OH | Ohio: Cleveland metro area, excluding Cleveland (split from 216, see also 330) |
| 441 | -- | Bermuda (part of what used to be 809) |
| 442 | CA | Far north suburbs of San Diego (Oceanside, Escondido, SUSPENDED -- originally perm 10/21/00, mand 4/14/01) |
| 443 | MD | E Maryland: Baltimore, Annapolis, Chesapeake Bay area, Ocean City (overlaid on 410) |
| 450 | QC | Canada: Southeastern Quebec; suburbs outside metro Montreal |
| 456 | -- | Inbound International |
| 464 | IL | Illinois: south suburbs of Chicago (see 630; overlaid on 708) |
| 469 | TX | Texas: Dallas Metro (overlays 214/972) |
| 470 | GA | Georgia: Greater Atlanta Metropolitan Area (overlaid on 404/770/678; mand 9/2/01) |
| 473 | -- | Grenada ("new" -- split from 809) |
| 475 | CT | Connecticut: New Haven, Greenwich, southwestern (postponed; was perm 1/6/01; mand 3/1/01???) |
| 478 | GA | Central Georgia: Macon (split from 912; see also 229; perm 8/1/00; mand 8/1/01) |
| 479 | AR | NW Arkansas: Fort Smith, Fayetteville, Springdale, Bentonville (SPLIt from 501, perm 1/19/02, mand 7/20/02) |
| 480 | AZ | Arizona: East Phoenix (see 520; also Phoenix split 602, 623) |
| 484 | PA | SE Pennsylvania: Allentown, Bethlehem, Reading, West Chester, Norristown (see 610) |
| 500 | -- | Personal Communication Service |
| 501 | AR | Central Arkansas: Little Rock, Hot Springs, Conway (see split 479) |
| 502 | KY | N Central Kentucky: Louisville (see 270) |
| 503 | OR | Oregon (see 541, 971) |
| 504 | LA | E Louisiana: New Orleans metro area (see splits 225, 985) |
| 505 | NM | North central and northwestern New Mexico (Albuquerque, Santa Fe, Los Alamos; see split 575, eff 10/07/07) |
| 506 | NB | Canada: New Brunswick |
| 507 | MN | S Minnesota: Rochester, Mankato, Worthington |
| 508 | MA | Cent. Massachusetts: Framingham; Cape Cod (see split 978, overlay 774) |
| 509 | WA | E and Central Washington state: Spokane, Yakima, Walla Walla, Ellensburg |
| 510 | CA | California: Oakland, East Bay (see 925) |
| 511 | -- | Nationwide travel information |
| 512 | TX | S Texas: Austin (see split 361; overlay 737, perm 11/10/01) |
| 513 | OH | SW Ohio: Cincinnati (see split 937; overlay 283 cancelled) |
| 514 | QC | Canada: SW Quebec: Montreal city (see overlay 438, eff 10/10/03, mand 2/7/04) |
| 515 | IA | Cent. Iowa: Des Moines (see split 641) |
| 516 | NY | New York: Nassau County, Long Island; Hempstead (see split 631) |
| 517 | MI | Cent. Michigan: Lansing (see split 989) |
| 518 | NY | NE New York: Albany |
| 519 | ON | Canada: SW Ontario: Windsor (see overlay 226) |
| 520 | AZ | SE Arizona: Tucson area (split from 602; see split 928) |
| 530 | CA | NE California: Eldorado County area, excluding Eldorado Hills itself: incl cities of Auburn, Chico, Redding, So. Lake Tahoe, Marysville, Nevada City/Grass Valley (split from 916) |
| 540 | VA | Western and Southwest Virginia: Shenandoah and Roanoke valleys: Fredericksburg, Harrisonburg, Roanoke, Salem, Lexington and nearby areas (see split 276; split from 703) |
| 541 | OR | Oregon: Eugene, Medford (split from 503; 503 retains NW part [Portland/Salem], all else moves to 541; eastern oregon is UTC-7) |
| 551 | NJ | N New Jersey: Jersey City, Hackensack (overlaid on 201) |
| 555 | -- | Reserved for directory assistance applications |
| 557 | MO | SE Missouri: St Louis metro area only (cancelled: overlaid on 314) |
| 559 | CA | Central California: Fresno (split from 209) |
| 561 | FL | S. Central Florida: Palm Beach County (West Palm Beach, Boca Raton, Vero Beach; see split 772, eff 2/11/02; mand 11/11/02) |
| 562 | CA | California: Long Beach (split from 310 Los Angeles) |
| 563 | IA | E Iowa: Davenport, Dubuque (split from 319, eff 3/25/01) |
| 564 | WA | W Washington State: Olympia, Bellingham (overlaid on 360; see also 206, 253, 425; assigned but not in use) |
| 567 | OH | NW Ohio: Toledo (overlaid on 419, perm 1/1/02) |
| 570 | PA | NE and N Central Pennsylvania: Wilkes-Barre, Scranton (see 717) |
| 571 | VA | Northern Virginia: Arlington, McLean, Tysons Corner (to be overlaid on 703 3/1/00; see earlier split 540) |
| 573 | MO | SE Missouri: excluding St Louis metro area, includes Central/East Missouri, area between St. Louis and Kansas City |
| 574 | IN | N Indiana: Elkhart, South Bend (split from 219) |
| 575 | NM | New Mexico (Las Cruces, Alamogordo, Roswell; split from 505, eff 10/07/07) |
| 580 | OK | W Oklahoma (rural areas outside Oklahoma City; split from 405) |
| 585 | NY | NW New York: Rochester (split from 716) |
| 586 | MI | Michigan: Macomb County (split from 810; perm 9/22/01, mand 3/23/02) |
| 600 | -- | Canadian Services |
| 601 | MS | Mississippi: Meridian, Jackson area (see splits 228, 662; overlay 769) |
| 602 | AZ | Arizona: Phoenix (see 520; also Phoenix split 480, 623) |
| 603 | NH | New Hampshire |
| 604 | BC | Canada: British Columbia: Greater Vancouver (overlay 778, perm 11/3/01; see 250) |
| 605 | SD | South Dakota |
| 606 | KY | E Kentucky: area east of Frankfort: Ashland (see 859) |
| 607 | NY | S Cent. New York: Ithaca, Binghamton; Catskills |
| 608 | WI | SW Wisconsin: Madison |
| 609 | NJ | S New Jersey: Trenton (see 856) |
| 610 | PA | SE Pennsylvania: Allentown, Bethlehem, Reading, West Chester, Norristown (see overlays 484, 835) |
| 611 | -- | Reserved for special applications |
| 612 | MN | Cent. Minnesota: Minneapolis (split from St. Paul, see 651; see splits 763, 952) |
| 613 | ON | Canada: SE Ontario: Ottawa |
| 614 | OH | SE Ohio: Columbus (see overlay 380) |
| 615 | TN | Northern Middle Tennessee: Nashville metro area (see 423, 931) |
| 616 | MI | W Michigan: Holland, Grand Haven, Greenville, Grand Rapids, Ionia (see split 269) |
| 617 | MA | Massachusetts: greater Boston (see overlay 857) |
| 618 | IL | S Illinois: Centralia |
| 619 | CA | S California: San Diego (see split 760; overlay 858, 935) |
| 620 | KS | S Kansas: Wichita (split from 316; perm 2/3/01) |
| 623 | AZ | Arizona: West Phoenix (see 520; also Phoenix split 480, 602) |
| 626 | CA | E S California: Pasadena (split from 818 Los Angeles) |
| 627 | CA | No longer in use [was Napa, Sonoma counties (perm 10/13/01, mand 4/13/02); now 707] |
| 628 | CA | (Region unknown; perm 10/21/00) |
| 630 | IL | W NE Illinois, western suburbs of Chicago (part of what used to be 708; overlay 331) |
| 631 | NY | New York: Suffolk County, Long Island; Huntington, Riverhead (split 516) |
| 636 | MO | Missouri: W St. Louis metro area of St. Louis county, St. Charles County, Jefferson County area south (between 314 and 573) |
| 641 | IA | Iowa: Mason City, Marshalltown, Creston, Ottumwa (split from 515; perm 7/9/00) |
| 646 | NY | New York (overlay 212/917) NYC: Manhattan only |
| 647 | ON | Canada: S Cent. Ontario: Toronto (overlaid on 416; eff 3/5/01) |
| 649 | -- | Turks & Caicos Islands |
| 650 | CA | California: Peninsula south of San Francisco -- San Mateo County, parts of Santa Clara County (split from 415) |
| 651 | MN | Cent. Minnesota: St. Paul (split from Minneapolis, see 612) |
| 660 | MO | N Missouri (split from 816) |
| 661 | CA | California: N Los Angeles, Mckittrick, Mojave, Newhall, Oildale, Palmdale, Taft, Tehachapi, Bakersfield, Earlimart, Lancaster (split from 805) |
| 662 | MS | N Mississippi: Tupelo, Grenada (split from 601) |
| 664 | -- | Montserrat (split from 809) |
| 669 | CA | Cent. Coastal California: San Jose (rejected was: overlaid on 408) |
| 670 | MP | Commonwealth of the Northern Mariana Islands (CNMI, US Commonwealth) |
| 671 | GU | Guam |
| 678 | GA | N Georgia: metropolitan Atlanta (overlay; see 404, 770) |
| 679 | MI | Michigan: Dearborn area (overlaid on 313; assigned but not in use) |
| 682 | TX | Texas: Fort Worth areas (perm 10/7/00, mand 12/9/00) |
| 684 | -- | American Samoa |
| 689 | FL | Central Florida: Metro Orlando (see overlay 321; overlaid on 407, assigned but not in use) |
| 700 | -- | Interexchange Carrier Services |
| 701 | ND | North Dakota |
| 702 | NV | S. Nevada: Clark County, incl Las Vegas (see 775) |
| 703 | VA | Northern Virginia: Arlington, McLean, Tysons Corner (see split 540; overlay 571) |
| 704 | NC | W North Carolina: Charlotte (see split 828, overlay 980) |
| 705 | ON | Canada: NE Ontario: Sault Ste. Marie/N Ontario: N Bay, Sudbury |
| 706 | GA | N Georgia: Columbus, Augusta (see overlay 762) |
| 707 | CA | NW California: Santa Rosa, Napa, Vallejo, American Canyon, Fairfield |
| 708 | IL | Illinois: southern and western suburbs of Chicago (see 630; overlay 464) |
| 709 | NL | Canada: Newfoundland and Labrador |
| 710 | -- | US Government |
| 711 | -- | Telecommunications Relay Services |
| 712 | IA | W Iowa: Council Bluffs |
| 713 | TX | Mid SE Texas: central Houston (split, 281; overlay 832) |
| 714 | CA | North and Central Orange County (see split 949) |
| 715 | WI | N Wisconsin: Eau Claire, Wausau, Superior |
| 716 | NY | NW New York: Buffalo (see split 585) |
| 717 | PA | E Pennsylvania: Harrisburg (see split 570) |
| 718 | NY | New York City, New York (Queens, Staten Island, The Bronx, and Brooklyn; see 212, 347) |
| 719 | CO | SE Colorado: Pueblo, Colorado Springs |
| 720 | CO | Central Colorado: Denver (overlaid on 303) |
| 724 | PA | SW Pennsylvania (areas outside metro Pittsburgh; split from 412) |
| 727 | FL | Florida Tampa Metro: Saint Petersburg, Clearwater (Pinellas and parts of Pasco County; split from 813) |
| 731 | TN | W Tennessee: outside Memphis metro area (split from 901, perm 2/12/01, mand 9/17/01) |
| 732 | NJ | Cent. New Jersey: Toms River, New Brunswick, Bound Brook (see overlay 848) |
| 734 | MI | SE Michigan: west and south of Detroit -- Ann Arbor, Monroe (split from 313) |
| 737 | TX | S Texas: Austin (overlaid on 512, suspended; see also 361) |
| 740 | OH | SE Ohio (rural areas outside Columbus; split from 614) |
| 747 | CA | S California: Los Angeles, Agoura Hills, Calabasas, Hidden Hills, and Westlake Village (see 818; implementation suspended) |
| 754 | FL | Florida: Broward County area, incl Ft. Lauderdale (overlaid on 954; perm 8/1/01, mand 9/1/01) |
| 757 | VA | E Virginia: Tidewater / Hampton Roads area -- Norfolk, Virginia Beach, Chesapeake, Portsmouth, Hampton, Newport News, Suffolk (part of what used to be 804) |
| 758 | -- | St. Lucia (split from 809) |
| 760 | CA | California: San Diego North County to Sierra Nevada (split from 619) |
| 762 | GA | N Georgia: Columbus, Augusta (overlaid on 706) |
| 763 | MN | Minnesota: Minneapolis NW (split from 612; see also 952) |
| 764 | CA | (overlay on 650; SUSPENDED) |
| 765 | IN | Indiana: outside Indianapolis (split from 317) |
| 767 | -- | Dominica (split from 809) |
| 769 | MS | Mississippi: Meridian, Jackson area (overlaid on 601; perm 7/19/04, mand 3/14/05) |
| 770 | GA | Georgia: Atlanta suburbs: outside of I-285 ring road (part of what used to be 404; see also overlay 678) |
| 772 | FL | S. Central Florida: St. Lucie, Martin, and Indian River counties (split from 561; eff 2/11/02; mand 11/11/02) |
| 773 | IL | Illinois: city of Chicago, outside the loop (see 312; overlay 872) |
| 774 | MA | Cent. Massachusetts: Framingham; Cape Cod (see split 978, overlaid on 508, eff 4/2/01) |
| 775 | NV | N. Nevada: Reno (all of NV except Clark County area; see 702) |
| 778 | BC | Canada: British Columbia: Greater Vancouver (overlaid on 604, per 11/3/01; see also 250) |
| 779 | IL | NW Illinois: Rockford, Kankakee (overlaid on 815; eff 8/19/06, mand 2/17/07) |
| 780 | AB | Canada: Northern Alberta, north of Lacombe (see 403) |
| 781 | MA | Massachusetts: Boston surburbs, to the north and west (see splits 617, 508; overlay 339) |
| 784 | -- | St. Vincent & Grenadines (split from 809) |
| 785 | KS | N & W Kansas: Topeka (split from 913) |
| 786 | FL | SE Florida, Monroe County (Miami; overlaid on 305) |
| 787 | PR | Puerto Rico (see overlay 939, perm 8/1/01) |
| 800 | -- | US/Canada toll free (see 888, 877, 866, 855, 844, 833, 822) |
| 801 | UT | Utah: Salt Lake City Metro (see split 385, eff 3/30/02; see also split 435) |
| 802 | VT | Vermont |
| 803 | SC | South Carolina: Columbia, Aiken, Sumter (see 843, 864) |
| 804 | VA | E Virginia: Richmond (see splits 757, 434) |
| 805 | CA | S Cent. and Cent. Coastal California: Ventura County, Santa Barbara County: San Luis Obispo, Thousand Oaks, Carpinteria, Santa Barbara, Santa Maria, Lompoc, Santa Ynez Valley / Solvang (see 661 split) |
| 806 | TX | Panhandle Texas: Amarillo, Lubbock |
| 807 | ON | Canada: W Ontario: Thunder Bay region to Manitoba border |
| 808 | HI | Hawaii |
| 809 | -- | Dominican Republic (see splits 264, 268, 284, 340, 441, 473, 664, 758, 767, 784, 868, 876; overlay 829) |
| 810 | MI | E Michigan: Flint, Pontiac (see 248; split 586) |
| 811 | -- | Reserved for special applications |
| 812 | IN | S Indiana: Evansville, Cincinnati outskirts in IN, Columbus, Bloomington (mostly GMT-5) |
| 813 | FL | SW Florida: Tampa Metro (splits 727 St. Petersburg, Clearwater, and 941 Sarasota) |
| 814 | PA | Cent. Pennsylvania: Erie |
| 815 | IL | NW Illinois: Rockford, Kankakee (see overlay 779; eff 8/19/06, mand 2/17/07) |
| 816 | MO | N Missouri: Kansas City (see split 660, overlay 975) |
| 817 | TX | N Cent. Texas: Fort Worth area (see 254, 940) |
| 818 | CA | S California: Los Angeles: San Fernando Valley (see 213, 310, 562, 626, 747) |
| 819 | QC | NW Quebec: Trois Rivieres, Sherbrooke, Outaouais (Gatineau, Hull), and the Laurentians (up to St Jovite / Tremblant) (see 867) |
| 822 | -- | US/Canada toll free (proposed, may not be in use yet) |
| 828 | NC | W North Carolina: Asheville (split from 704) |
| 829 | -- | Dominican Republic (perm 1/31/05; mand 8/1/05; overlaid on 809) |
| 830 | TX | Texas: region surrounding San Antonio (split from 210) |
| 831 | CA | California: central coast area from Santa Cruz through Monterey County |
| 832 | TX | Texas: Houston (overlay 713/281) |
| 833 | -- | US/Canada toll free (proposed, may not be in use yet) |
| 835 | PA | SE Pennsylvania: Allentown, Bethlehem, Reading, West Chester, Norristown (overlaid on 610, eff 5/1/01; see also 484) |
| 843 | SC | South Carolina, coastal area: Charleston, Beaufort, Myrtle Beach (split from 803) |
| 844 | -- | US/Canada toll free (proposed, may not be in use yet) |
| 845 | NY | New York: Poughkeepsie; Nyack, Nanuet, Valley Cottage, New City, Putnam, Dutchess, Rockland, Orange, Ulster and parts of Sullivan counties in New York's lower Hudson Valley and Delaware County in the Catskills (see 914; perm 6/5/00) |
| 847 | IL | Northern NE Illinois: northwestern suburbs of chicago (Evanston, Waukegan, Northbrook; see overlay 224) |
| 848 | NJ | Cent. New Jersey: Toms River, New Brunswick, Bound Brook (see overlay 732) |
| 850 | FL | Florida panhandle, from east of Tallahassee to Pensacola (split from 904); western panhandle (Pensacola, Panama City) are UTC-6 |
| 855 | -- | US/Canada toll free (proposed, may not be in use yet) |
| 856 | NJ | SW New Jersey: greater Camden area, Mt Laurel (split from 609) |
| 857 | MA | Massachusetts: greater Boston (overlaid on 617, eff 4/2/01) |
| 858 | CA | S California: San Diego (see split 760; overlay 619, 935) |
| 859 | KY | N and Central Kentucky: Lexington; suburban KY counties of Cincinnati OH metro area; Covington, Newport, Ft. Thomas, Ft. Wright, Florence (split from 606) |
| 860 | CT | Connecticut: areas outside of Fairfield and New Haven Counties (split from 203, overlay 959) |
| 862 | NJ | N New Jersey: Newark Paterson Morristown (overlaid on 973) |
| 863 | FL | Florida: Lakeland, Polk County (split from 941) |
| 864 | SC | South Carolina, upstate area: Greenville, Spartanburg (split from 803) |
| 865 | TN | E Tennessee: Knoxville, Knox and adjacent counties (split from 423; part of what used to be 615) |
| 866 | -- | US/Canada toll free |
| 867 | YT | Canada: Yukon, Northwest Territories, Nunavut (split from 403/819) |
| 868 | -- | Trinidad and Tobago ("new" -- see 809) |
| 869 | -- | St. Kitts & Nevis |
| 870 | AR | Arkansas: areas outside of west/central AR: Jonesboro, etc |
| 872 | IL | Illinois: Chicago (downtown only -- in the loop; see 773; overlaid on 312 and 773) |
| 876 | -- | Jamaica (split from 809) |
| 877 | -- | US/Canada toll free |
| 878 | PA | Pittsburgh, New Castle (overlaid on 412, perm 8/17/01, mand t.b.a.) |
| 880 | -- | Paid Toll-Free Service |
| 881 | -- | Paid Toll-Free Service |
| 882 | -- | Paid Toll-Free Service |
| 888 | -- | US/Canada toll free |
| 898 | -- | VoIP service |
| 900 | -- | US toll calls -- prices vary with the number called |
| 901 | TN | W Tennessee: Memphis metro area (see 615, 931, split 731) |
| 902 | NS | Canada: Nova Scotia, Prince Edward Island |
| 903 | TX | NE Texas: Tyler (see overlay 430, eff 7/20/02) |
| 904 | FL | N Florida: Jacksonville (see splits 352, 386, 850) |
| 905 | ON | Canada: S Cent. Ontario: Greater Toronto Area -- Durham, Halton, Hamilton-Wentworth, Niagara, Peel, York, and southern Simcoe County (excluding Toronto -- see overlay 289 [eff 6/9/01], splits 416, 647) |
| 906 | MI | Upper Peninsula Michigan: Sault Ste. Marie, Escanaba, Marquette (UTC-6 towards the WI border) |
| 907 | AK | Alaska |
| 908 | NJ | Cent. New Jersey: Elizabeth, Basking Ridge, Somerville, Bridgewater, Bound Brook |
| 909 | CA | California: Inland empire: San Bernardino (see split 951), Riverside |
| 910 | NC | S Cent. North Carolina: Fayetteville, Wilmington (see 336) |
| 911 | -- | Emergency |
| 912 | GA | SE Georgia: Savannah (see splits 229, 478) |
| 913 | KS | Kansas: Kansas City area (see 785) |
| 914 | NY | S New York: Westchester County (see 845) |
| 915 | TX | W Texas: El Paso (see splits 325 eff 4/5/03; 432, eff 4/5/03) |
| 916 | CA | NE California: Sacramento, Walnut Grove, Lincoln, Newcastle and El Dorado Hills (split to 530) |
| 917 | NY | New York: New York City (cellular, see 646) |
| 918 | OK | E Oklahoma: Tulsa |
| 919 | NC | E North Carolina: Raleigh (see split 252, overlay 984) |
| 920 | WI | NE Wisconsin: Appleton, Green Bay, Sheboygan, Fond du Lac (from Beaver Dam NE to Oshkosh, Appleton, and Door County; part of what used to be 414) |
| 925 | CA | California: Contra Costa area: Antioch, Concord, Pleasanton, Walnut Creek (split from 510) |
| 927 | FL | Florida: Cellular coverage in Orlando area |
| 928 | AZ | Central and Northern Arizona: Prescott, Flagstaff, Yuma (split from 520) |
| 931 | TN | Middle Tennessee: semi-circular ring around Nashville (split from 615) |
| 935 | CA | S California: San Diego (see split 760; overlay 858, 619; assigned but not in use) |
| 936 | TX | SE Texas: Conroe, Lufkin, Nacogdoches, Crockett (split from 409, see also 979) |
| 937 | OH | SW Ohio: Dayton (part of what used to be 513) |
| 939 | PR | Puerto Rico (overlaid on 787, perm 8/1/01) |
| 940 | TX | N Cent. Texas: Denton, Wichita Falls (split from 254, 817) |
| 941 | FL | SW Florida: Sarasota and Manatee counties (part of what used to be 813; see split 863) |
| 947 | MI | Michigan: Oakland County (overlays 248, perm 5/5/01) |
| 949 | CA | California: S Coastal Orange County (split from 714) |
| 951 | CA | California: W Riverside County (split from 909; eff 7/17/04) |
| 952 | MN | Minnesota: Minneapolis SW, Bloomington (split from 612; see also 763) |
| 954 | FL | Florida: Broward County area, incl Ft. Lauderdale (part of what used to be 305, see overlay 754) |
| 956 | TX | Texas: Valley of Texas area; Harlingen, Laredo (split from 210) |
| 957 | NM | New Mexico (pending; region unknown) |
| 959 | CT | Connecticut: Hartford, New London (postponed; was overlaid on 860 perm 1/6/01; mand 3/1/01???) |
| 970 | CO | N and W Colorado (part of what used to be 303) |
| 971 | OR | Oregon: Metropolitan Portland, Salem/Keizer area, incl Cricket Wireless (see 503; perm 10/1/00) |
| 972 | TX | Texas: Dallas Metro (overlays 214/469) |
| 973 | NJ | N New Jersey: Newark, Paterson, Morristown (see overlay 862; split from 201) |
| 975 | MO | N Missouri: Kansas City (overlaid on 816) |
| 976 | -- | Unassigned |
| 978 | MA | Massachusetts: north of Boston to NH (see split 978 -- this is the northern half of old 508; see overlay 351) |
| 979 | TX | SE Texas: Bryan, College Station, Bay City (split from 409, see also 936) |
| 980 | NC | North Carolina: (overlay on 704; perm 5/1/00, mand 3/15/01) |
| 984 | NC | E North Carolina: Raleigh (overlaid on 919, perm 8/1/01, mand 2/5/02 POSTPONED) |
| 985 | LA | E Louisiana: SE/N shore of Lake Pontchartrain: Hammond, Slidell, Covington, Amite, Kentwood, area SW of New Orleans, Houma, Thibodaux, Morgan City (split from 504; perm 2/12/01; mand 10/22/01) |
| 989 | MI | Upper central Michigan: Mt Pleasant, Saginaw (split from 517; perm 4/7/01) |
| 999 | -- | Often used by carriers to indicate that the area code information is unavailable for CNID, even though the rest of the number is present |