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this was the first part of North America to have its code changed three times: from 213 to 714 1951: to 619 in 1982, and to 760 in 1997. was to have originally split off the portion of 760 serving San Diego County to a new 442 area code in late 2008/early 2009; that plan was cancelled. 2009: overlaid by 442. 761.
2025 – 4th Qtr [3] April 26, 2025 [4] [25] NPA boundary changes, overlay expansions, etc. 564. 206. Washington. 2026 – 1st Qtr. April 5, 2025 [26] Other area codes that are expected to exhaust by the end of 2027 that do not have an approved relief plan: 352, 502, 520, 603, 714/657, 718/347/929, 765 and 949.
This is a list of the area codes in the state of Illinois and its numbering plan areas in the North American Numbering Plan.. All NPAs within Illinois. 217/447: Central Illinois, including the region running west from the Illinois-Indiana border through Danville, Effingham, Champaign–Urbana, Decatur, Springfield, Quincy until Illinois' western border with Missouri and Iowa.
The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period. The program had the goal of speeding the connecting times for long-distance calling by eliminating intermediary telephone operators.
Lists of North American area codes. The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union .
Area codes 847 and 224 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of Illinois. The numbering plan area (NPA) comprises the northeastern part of Illinois and many northern suburbs of Chicago. This includes most of Lake County, the northern part of Cook County, the northern part of Kane County, and a ...
Quad Cities (parts of Iowa and Illinois) Sacramento metropolitan area (parts of California and Nevada) Greater St. Louis (parts of Missouri and Illinois) Texarkana metropolitan area (parts of Texas and Arkansas) Tri-Cities (parts of Tennessee and Virginia) Twin Ports (Duluth, Minnesota and Superior, Wisconsin)
Seattle, Shoreline, Lake Forest Park, Mercer Island, Bainbridge Island, Vashon Island. Original statewide area code until 1957, when area code 509 was created for Eastern Washington. Further splits in 1995 to create area code 360 for most of Western Washington, and 1997 to form area codes 253 and 425. 564 will be added to the 206 area in 2025. 509.