900-999
900: premium-rate telephone numbers
901: Tennessee (Memphis, Covington, Germantown, Somerville, and extreme southwestern Tennessee, mostly in Shelby County).
- Originally covered all of Tennessee; split to create 615 (1954) and 731 (2001).
902: Nova Scotia and Prince Edward Island
- Originally also covered New Brunswick, which split to form 506 in 1955.
- Overlain by 782 in 2012/2014.
903: Texas (Tyler, Sherman, Longview, Marshall, Palestine, Jacksonville, Carthage, and Northeast Texas)
- Created in 1990 by split from 214.
- Overlain by 430 in 2003.
- Prior to 1990, 903 served portions of Mexico.
904:Florida (Jacksonville, St. Augustine, Starke, and most of northeastern Florida)
- Created in 1965 by split from 305.
- Split to create 352 (1995) and 850 (1997).
905: Province of Ontario (Niagara Falls Region, Hamilton, St. Catharines, suburbs of the Greater Toronto Area, and southeastern Ontario)
- Created in 1993 by splitting it off from 416.
- Overlain by 289 in 2001.
- Overlain by 365 by 2013.
- Prior to 1991, 905 was the area code for Mexico City.
906: Michigan: Upper Peninsula of Michigan: (Sault Ste. Marie, Escanaba, Houghton, Iron Mountain, Marquette, Menominee, etc.
- Created in 1961 by split from 616.
907: all of Alaska excluding the lone town of Hyder
908: New Jersey (Alpha, Washington, Elizabeth, Warren, Plainfield, and west-central New Jersey)
- Created in 1991 by splitting it from 201.
- Split in 1997 to create 732.
909: California (western portions of San Bernardino County, and parts of Los Angeles County and Riverside County, including Fontana, Pomona, Chino Hills, Claremont, Chino, Ontario, Redlands) Pomona is in Los Angeles County, and it is the home of the county fair.
- Created in 1992 by split from 714.
- Split in 2004 to create 951.
910: North Carolina (Fayetteville, Wilmington, Fort Bragg, Seymour Johnson Air Force Base, Jacksonville, Lumberton and much of southeastern North Carolina)
- Created in 1993 by splitting it off from 919.
- Split in 1997 to create 336.
911: Emergency Services
912: Georgia (Savannah, Statesboro, Vidalia, Waycross, Brunswick, Douglas, and southeastern Georgia)
- Created in 1954 by split from 404 to give Georgia two area codes.
- Split in 2000 to create 229 and 478.
913: Kansas (Kansas City, Kansas, Overland Park, Leavenworth, Ft. Leavenworth, parts of eastern Kansas)
- Split in 1997 to create 785.
914: New York State (Westchester County)
- Split to create 516 in 1951 and 845 in the year 2000.
915: Texas (all of El Paso County and portions of Hudspeth County)
- Split to create part of 817 in 1953 and part of 806 in 1957.
- Split in 2003 to create 325 and 432.
916: California (the Sacramento Metropolitan Area)
- Originally covered about one-third of California. It was split in 1958 to create 209 and in 1997 to create 530.
917: New York State (New York City; cellular telephones)
- Overlain on 212 and 718 in 1992.
918: Oklahoma (Tulsa, Bartlesville, McAlester, Muskogee, Henryetta and northeastern Oklahoma)
- Created in 1953 by split from 405, and to give Oklahoma two area codes, one centered on Oklahoma City and the other centered on Tulsa
- Overlain by 539 in 2011.
919: North Carolina (Raleigh, the state capital city, Durham, Chapel Hill, Goldsboro, and part of north-central North Carolina)
- Created in 1954 by splitting it from 704 to give North Carolina two area codes.
- Split in 1998 to create 252.
920: Wisconsin (Appleton, Sheboygan, Oshkosh, Green Bay, Manitowoc, Marquette, Fond du Lac, and parts of eastern Wisconsin—but not Milwaukee County)
- Created in 1997 by splitting it off from 414.
- To be overlain by 274 in 2010.
921–924: not used, yet
925: California (Livermore, Concord, Pleasant Hill, Walnut Creek, Martinez, Pleasanton and Dublin, just east of San Francisco Bay. Much of this area is served by the Bay Area Rapid Transit system, including Concord.)
- Created in 1998 by splitting it off from 510.
926–927: not used, yet
928: Arizona (Flagstaff, Kingman, Lake Havasu City, Page, Payson, Prescott, Tuba City, Williams, Winslow, Window Rock, Yuma, and most of northern and western Arizona, including the Grand Canyon National Park, the Lower Colorado River Valley, and the Navajo Nation)
- Created in 2001 by split from 520.
929: New York
- Overlain on 347, 718 and part of 917 in 2011.
930: not used
931: Tennessee (Middle Tennessee, excluding the Nashville Metropolitan Area, which is in 615: Clarksville, Manchester, Columbia, Cookeville, Sparta)
- Created in 1997 by split from 615.
932–934: not used
935 is assigned for numbering relief to 619 (San Diego), but no date has been scheduled for this to go into effect.
936: Texas (Nacogdoches, Lufkin, Conroe, Huntsville, Center, and Southeast Texas)
- Created in 2000 by split from 409.
937: Ohio (Dayton, Marysville, Springfield, Hillsboro, and southwestern Ohio excluding the Cincinnati Metropolitan Area)
- Created in 1996 by split from 513.
938: Alabama (Huntsville, Anniston, Cullman, Decatur, Florence, Ft. Payne, Gadsden, Madison, Sheffield, Tuscumbia)
- Overlain on 256 in 2010.
939: Puerto Rico
- Overlain on 787 in 2001.
940: Texas (Denton, Wichita Falls, Decatur, Gainesville, Vernon, etc.) This is Texas immediately north of the Dallas–Fort Worth metroplex
- Created in 1997 by split from 817.
941: Florida (Gulf Coast immediately south of Tampa Bay: all of Manatee County, Sarasota County, and Charlotte County; includes Bradenton, Port Charlotte, Sarasota, and Punta Gorda.)
- Created in 1995 by split from 813.
- Split in 1999 to create 863.
- Split in 2002 to create 239.
942–946: not used
947: Michigan
- Overlain on 248 in 2002.
948: not used
949: California (Irvine, Lake Forest, California, Newport Beach, Corona del Mar, and part of southern Orange County)
- Created in 1998 by split from 714.
950: Used internally for carrier access
951: California (western Riverside County, including Riverside, Corona, Lake Elsinore, Mira Loma, Moreno Valley, Sun City, Temecula, Winchester, Lakeview, etc.)
- Created in 2000 by split from 909.
952: Minnesota (Bloomington, Eden Prairie, Edina, Minnetonka, Chaska, and the southwest suburban Minneapolis area)
- Created in 2000 (along with 763) by three-way split from 612.
953: not used
954: Florida (all of Broward County: Fort Lauderdale, Hollywood, Coral Springs, etc.)
- Created in 1995 by splitting it from 305.
- Overlain by 754 in 2002.
955: not used
956: Texas (Laredo, Harlingen, Brownsville, McAllen, and southmost Texas)
- Created in 1997 by splitting it from 210.
957–958: not used
959: Connecticut
- Planned to be overlain on 860 in or after 2011.
960–969: not used (96x block reserved in case consecutive numbers are ever needed)
970: Colorado (Grand Junction, Aspen, Durango, Estes Park, Fort Collins, Frisco, Glenwood Springs, Greeley, Purgatory, Steamboat Springs, Telluride, Vail, Rocky Mountain National Park, Dinosaur National Monument, and most of north-central, south-central, and western Colorado)
- Created in 1995 by splitting it off from 303.
971: Oregon (Portland, Salem, Hillsboro, Beaverton, and most of northwestern Oregon)
- Partially overlain on 503 in 2000. Clatsop County and Tillamook County, originally excluded from the overlay, were added to it in 2008.
972: Texas
- Split from 214 in 1996. In 1999, the split was modified to become an overlay, and a second overlay area code of 469 was added.
973: New Jersey (Newark, Paterson, and most of northeastern New Jersey)
- Created in 1997 by split from 201.
- Overlain by 862.
974: not used
975 is assigned for numbering relief to 816 (Missouri) but no date has been scheduled for this to go into effect.
976–977: not used
978: Massachusetts (Fitchburg, Peabody, Swampscott, and northeastern Massachusetts)
- Created in 1997 by splitting it off from 508.
- Overlain by 351 in 2001.
979: Texas (Wharton, Bryan, Bay City, College Station, Lake Jackson, La Grange, and southeastern Texas)
- Created in 2000 by splitting it off from 409.
980: North Carolina
- Overlain on 704 in 2001.
981–983: not used
984 is assigned for overlay relief to 919 (North Carolina) but no date has been scheduled for this to go into effect. (Twenty thousands blocks have been assigned to a switch in Raleigh, North Carolina.)
985: Louisiana (Houma, Slidell, and southeastern Louisiana excluding New Orleans)
- Created in 2001 by split from 504.
986–988: not used
989: Michigan (Alpena, Mt. Pleasant, Bay City, Saginaw, Midland, Owosso, and part of central Michigan)
- Created in 2000 by split from 517.
990–999: Reserved for potential North American Numbering Plan expansion
Read more about this topic: List Of North American Numbering Plan Area Codes