| 800 | toll-free; (see also 811, 822, 833, 844, 855, 866, 877, 888)More information at: Area Code 800 Phone Number Blocks |
| 801 | Utah (Salt Lake, Utah, Davis, Weber and Morgan counties, will overlay with 385 beginning mid-2008)More information at: Area Code 801 Phone Number Blocks |
| 802 | Vermont (all)More information at: Area Code 802 Phone Number Blocks |
| 803 | South Carolina (Columbia, Rock Hill, Sumter, Aiken and central South Carolina)More information at: Area Code 803 Phone Number Blocks |
| 804 | Virginia (Richmond, Petersburg, West Point, Chester; east central Virginia, Northern Neck, and Middle Peninsula)More information at: Area Code 804 Phone Number Blocks |
| 805 | California (San Luis Obispo, Santa Barbara, Isla Vista, Ventura, Santa Paula; southwest central coastal California)More information at: Area Code 805 Phone Number Blocks |
| 806 | Texas (Amarillo, Lubbock, Canadian, Perryton, Shamrock, Dalhart and Texas Panhandle)More information at: Area Code 806 Phone Number Blocks |
| 807 | Ontario (Northwestern Ontario: Thunder Bay, Kenora, Dryden, Greenstone)More information at: Area Code 807 Phone Number Blocks |
| 808 | Hawaii (all)More information at: Area Code 808 Phone Number Blocks |
| 809 | Today only covers the Dominican Republic, and is overlayed with 829. 809 was split into several area codes in the mid-1990s; the code previously covered all the Caribbean.More information at: Area Code 809 Phone Number Blocks |
| 810 | Michigan (Port Huron, Flint, Lapeer, and Michigan "Thumb", (originally split from 313 and included areas that later became 248 and 586)More information at: Area Code 810 Phone Number Blocks |
| 811 | Mobile customer service on some North American cellular carriers, also used as a 9-1-1 like emergency number to handle distress calls in much of Jamaica.More information at: Area Code 811 Phone Number Blocks |
| 812 | Indiana (Southern Indiana, including Bloomington, Evansville, Jeffersonville, New Albany, and Terre Haute).More information at: Area Code 812 Phone Number Blocks |
| 813 | Florida (all of Hillsborough County, including Tampa, Temple Terrace, and Plant City; inland areas of Pasco County, and Oldsmar)More information at: Area Code 813 Phone Number Blocks |
| 814 | Pennsylvania (Morrisdale, Erie, Warren, State College, Altoona, Johnstown, Meyersdale, Johnsonburg, St. Marys, Ridgway, DuBois, Emporium, and central and northwestern Pennsylvania)More information at: Area Code 814 Phone Number Blocks |
| 815 | Illinois (La Salle, De Kalb, Rockford, Freeport and northern Illinois including parts of the Chicago area such as Joliet, Plainfield and Crystal Lake, and is overlaid by 779)More information at: Area Code 815 Phone Number Blocks |
| 816 | Missouri (Kansas City, St Joseph, Independence, Harrisonville and west central Missouri)More information at: Area Code 816 Phone Number Blocks |
| 817 | Texas (Fort Worth, Arlington, Grandview, Weatherford, Rhome, overlays with 682)More information at: Area Code 817 Phone Number Blocks |
| 818 | California (Glendale, San Fernando, Burbank and northern Los Angeles suburbs)More information at: Area Code 818 Phone Number Blocks |
| 819 | Quebec (Abitibi-Temiscamingue, Mauricie, Outaouais and Estrie)More information at: Area Code 819 Phone Number Blocks |
| 822 | reserved for future toll-free expansion (see also 800, 833, 844, 855, 866, 877, 888)More information at: Area Code 822 Phone Number Blocks |
| 825 | reserved for future usage in Alberta, Canada.More information at: Area Code 825 Phone Number Blocks |
| 828 | North Carolina (Asheville, Brevard, Morganton, Murphy and western North Carolina)More information at: Area Code 828 Phone Number Blocks |
| 829 | the Dominican Republic (overlays with 809)More information at: Area Code 829 Phone Number Blocks |
| 830 | Texas (Del Rio, Uvalde, New Braunfels, Kerrville, Eagle Pass and southwest Texas)More information at: Area Code 830 Phone Number Blocks |
| 831 | California (Salinas, Hollister, Monterey, Santa Cruz and central western coastal California)More information at: Area Code 831 Phone Number Blocks |
| 832 | Texas (Houston area, overlays with 281 and 713)More information at: Area Code 832 Phone Number Blocks |
| 833 | reserved for future toll-free expansion (see also 800, 822, 844, 855, 866, 877, 888)More information at: Area Code 833 Phone Number Blocks |
| 835 | Pennsylvania (Reading, Allentown, and southeastern Pennsylvania, overlays with 484 and 610)More information at: Area Code 835 Phone Number Blocks |
| 843 | South Carolina (Florence, Myrtle Beach, Charleston, Isle of Palms, Hilton Head Island and eastern South Carolina)More information at: Area Code 843 Phone Number Blocks |
| 844 | reserved for future toll-free expansion (see also 800, 822, 833, 855, 866, 877, 888)More information at: Area Code 844 Phone Number Blocks |
| 845 | New York (Rockland, Poughkeepsie, Middletown, West Point, Newburgh and southeastern New York)More information at: Area Code 845 Phone Number Blocks |
| 847 | Illinois (Arlington Heights, Buffalo Grove, Wauconda, Waukegan, Des Plaines, northwest Chicago suburbs and northeastern Illinois, and is overlaid by 224)More information at: Area Code 847 Phone Number Blocks |
| 848 | New Jersey (New Brunswick, Neptune, Lakewood, and east central New Jersey, overlays with 732)More information at: Area Code 848 Phone Number Blocks |
| 850 | Florida (Pensacola, Tallahassee, Panama City and the Florida panhandle)More information at: Area Code 850 Phone Number Blocks |
| 855 | reserved for future toll-free expansion (see also 800, 822, 833, 844, 866, 877, 888)More information at: Area Code 855 Phone Number Blocks |
| 856 | New Jersey (Vineland, Cherry Hill, Camden, Millville, and southwestern New Jersey)More information at: Area Code 856 Phone Number Blocks |
| 857 | Massachusetts (Boston, Cambridge, east central Massachusetts and close-in Boston suburbs, overlays with 617)More information at: Area Code 857 Phone Number Blocks |
| 858 | California (Del Mar, La Jolla and other inner northern San Diego suburbs, northern half of city of San Diego)More information at: Area Code 858 Phone Number Blocks |
| 859 | Kentucky (Lexington, Richmond, Danville, Covington, Florence, Mount Sterling and north central Kentucky)More information at: Area Code 859 Phone Number Blocks |
| 860 | Connecticut (Bristol, Hartford, Norwich and northern and eastern Connecticut)More information at: Area Code 860 Phone Number Blocks |
| 862 | New Jersey (portions of Bergen, Essex, Morris, Passaic and Sussex counties in northern New Jersey)More information at: Area Code 862 Phone Number Blocks |
| 863 | Florida (Lakeland, Avon Park, Clewiston, Bartow, Sebring, Winter Haven and south central Florida)More information at: Area Code 863 Phone Number Blocks |
| 864 | South Carolina (Greenville, Spartanburg, Anderson and Upstate South Carolina)More information at: Area Code 864 Phone Number Blocks |
| 865 | Tennessee (Knoxville, Gatlinburg, Newport, Jefferson City, Oak Ridge, Rockwood and central East Tennessee), split from 423 in 1999. 865 one of many vanity area codes, is reference as 'VOL' representing Tennessee as the volunteer state.More information at: Area Code 865 Phone Number Blocks |
| 866 | toll-free (see also 800, 822, 833, 844, 855, 877, 888)More information at: Area Code 866 Phone Number Blocks |
| 867 | Yukon, Northwest Territories and NunavutMore information at: Area Code 867 Phone Number Blocks |
| 868 | Trinidad and Tobago, split from 809. (all)More information at: Area Code 868 Phone Number Blocks |
| 869 | Saint Kitts and Nevis, split from 809. (all)More information at: Area Code 869 Phone Number Blocks |
| 870 | Arkansas (Texarkana, Mountain Home, Pine Bluff and southern, eastern and northeastern Arkansas)More information at: Area Code 870 Phone Number Blocks |
| 872 | Illinois This Area code is scheduled to provide numbering relief to Area code 312 but no date has been assigned for this to go into effect.More information at: Area Code 872 Phone Number Blocks |
| 876 | Jamaica, split from 809. (all)More information at: Area Code 876 Phone Number Blocks |
| 877 | toll-free (see also 800, 822, 833, 844, 855, 866, 888)More information at: Area Code 877 Phone Number Blocks |
| 878 | Pennsylvania (Pittsburgh, New Castle, and southwestern Pennsylvania, overlays with 412 and 724)More information at: Area Code 878 Phone Number Blocks |
| 888 | toll-free (see also 800, 822, 833, 844, 855, 866, 877)More information at: Area Code 888 Phone Number Blocks |
