| 700 | Long Distance carrier use for pre-subscribing phone numbers, 1-700-555-4141 most often gives a recorded message indicating the default carrier on a line. |
| 701 | North Dakota (all) |
| 702 | Nevada (almost all of Clark County, including all of the Las Vegas Valley, including Henderson and Boulder City) |
| 703 | Virginia (Northern Virginia: Alexandria, Arlington, Fairfax, Prince William and eastern Loudoun counties, overlaid by 571) |
| 704 | North Carolina (Charlotte, Gastonia, Concord, Salisbury, and south central North Carolina, overlaid by 980) |
| 705 | Ontario (northeastern and central-North Bay, Sudbury, Sault Ste. Marie, Timmins, Barrie) |
| 706 | Georgia (Augusta, Columbus, Lagrange, Rome, Dalton, Thomaston and northern and west central Georgia), to be overlayed in 2006 despite having two completely separate disconnected parts |
| 707 | California (North Bay, Vallejo, Santa Rosa, Fort Bragg, Crescent City, Eureka, Ukiah and northwestern California) |
| 708 | Illinois (Chicago Heights, Tinley Park, Cicero, Oak Forest, Oak Park, Berwyn, and southern and inner western Chicago suburbs) |
| 709 | Newfoundland and Labrador |
| 710 | U.S. Government Special Services |
| 711 | Telephone devices for the deaf/Relay Service for TTY to Voice and Voice to TTY |
| 712 | Iowa (Estherville, Council Bluffs, Sioux City, Sheldon, Denison and western Iowa) |
| 713 | Texas (Houston area, overlays with 281 and 832) |
| 714 | California (Santa Ana, Huntington Beach, Orange, Garden Grove, Tustin, Anaheim, and northern Orange County) |
| 715 | Wisconsin (Rhinelander, Wausau, Eau Claire, Rice Lake, Ashland and northern Wisconsin) |
| 716 | New York (Buffalo, Jamestown, Niagara Falls, Tonawanda, Olean, and western New York) |
| 717 | Pennsylvania (Harrisburg, Gettysburg, Lancaster, York and south-central Pennsylvania) |
| 718 | New York (New York City: Brooklyn, Queens, Bronx, and Staten Island only; overlays with 347 and 917) |
| 719 | Colorado (Leadville, Pueblo, Colorado Springs, Trinidad, Rocky Ford, La Junta and southeastern Colorado) |
| 720 | Colorado (Boulder, Longmont, Aurora, Denver and central Colorado, overlays with 303) |
| 724 | Pennsylvania (New Castle, Washington, Uniontown and south western Pennsylvania, overlays with 878) |
| 727 | Florida (all of Pinellas County including Clearwater, St Petersburg, Dunedin; coastal-only parts of Pasco County) |
| 730 | Illinois Overlay of Area code 618 |
| 731 | Tennessee (West Tennessee excluding greater Memphis: Union City, Jackson, Dyersburg, Martin, Brownsville, Paris, Bolivar), split from 901 |
| 732 | New Jersey (New Brunswick, Neptune, Lakewood, and east central New Jersey, overlays with 848) |
| 734 | Michigan (Ann Arbor, Canton, Plymouth, Monroe, Wayne, Ypsilanti, Romulus and southwestern Detroit suburbs) |
| 737 | Texas This Area code is scheduled to provide numbering relief to area code 512 but no date has been assigned for this to go into effect. |
| 740 | Ohio (Jackson, Lancaster, Marietta, Marion, Cambridge, Zanesville, New Castle, Athens, and southeastern Ohio) |
| 747 | California (San Fernando Valley) This Area code is scheduled to provide numbering relief to area code 818 but no date has been assigned for this to go into effect. |
| 754 | Florida (All of Broward County: Fort Lauderdale, Hollywood, Coral Springs, overlays with 954) |
| 757 | Virginia (Hampton Roads area and Eastern Shore; until the mid-1990s, a part of 804) |
| 758 | Saint Lucia, split from 809. (all) |
| 760 | California (Bishop, Ridgecrest, Barstow, eastern portions of San Bernardino and Riverside counties (including the Palm Springs-Indio area), Imperial County, and outer northern suburbs and eastern mountains of San Diego County) |
| 762 | Georgia (Augusta, Columbus, Lagrange, Rome, Dalton and northern and west central Georgia) Overlay code for area code 706 |
| 763 | Minnesota (Maple Grove, Monticello, Elk River, Fridley, Blaine, and northwest Minneapolis area) |
| 764 | California This Area code is scheduled to provide numbering relief to Area code 650 but no date has been assigned for this to go into effect. |
| 765 | Indiana (Lafayette, Marion, Muncie, Richmond and central Indiana excluding Indianapolis) |
| 767 | Commonwealth of Dominica, split from 809. (all) |
| 769 | Mississippi (overlays with 601) |
| 770 | Georgia (Marietta, Cedartown, and central north Georgia (suburban metro Atlanta) outside Atlanta's Perimeter highway; overlaid by most of 678) |
| 772 | Florida (Vero Beach, Port Saint Lucie, Fort Pierce, Sebastian, Stuart and central eastern Florida) |
| 773 | Illinois (City of Chicago, excluding downtown; see also 312) |
| 774 | Massachusetts (Worcester, New Bedford and southeastern Massachusetts, overlays with 508) |
| 775 | Nevada (Reno, Elko, Ely and all of Nevada except Clark County and the Las Vegas Valley) |
| 778 | British Columbia (Greater Vancouver Regional District and Abbotsford only as part of the 604 concentrated overlay. Will overlay both area code 604 and area code 250 (ie. the entire province of British Columbia) in 2008.) |
| 779 | Illinois (Crystal Lake, Rockford, Joliet, and other outlying suburbs of Chicago; It overlays with 815) |
| 780 | Alberta (Edmonton, Jasper, Grande Prairie, Peace River and northern Alberta, split from 403) |
| 781 | Massachusetts (Saugus, Norwood, Waltham, Woburn, east central Massachusetts and other Boston suburbs along Route 128, overlays with 339) |
| 784 | Saint Vincent and the Grenadines, split from 809. (all) |
| 785 | Kansas (Colby, Topeka, Salina, Manhattan, Lawrence and northern Kansas) |
| 786 | Florida (exactly Miami-Dade County, not Florida Keys; overlays with most of 305) |
| 787 | Puerto Rico (overlays with 939), split from 809. |
