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Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes. In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes.
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For 43 years, the 13 counties around Tampa Bay, including cities such as Sarasota, Ellenton, and Port Charlotte were in area code 813. In 1998, Pinellas County and the western part of Pasco County were split into area code 727. 727 was going to be introduced in an overlay plan, to overlay 813. At the time, overlays were a new concept and since ...
Note: if this map must be replaced because new area codes are added, please start with the Master map "Area codes CA.svg" and update that first, then update all individual area code files from that master by coloring the individual area code red. This ensures all maps will be correct. (Note: as this page is primarily directed toward persons ...
As a result, the area of most of Pinellas County (except Oldsmar) and western Pasco County were split off on February 1, 1999 and received area code 727. [3] Oldsmar kept area code 813 despite being in Pinellas. Oldsmar was a tributary service area to the Tampa area, and tributary routes were in general not cut across NPA boundaries.
The 469th area code in the NANPA; 925: California (inland regions of the East Bay: Livermore, Concord, Pleasant Hill, Walnut Creek, Martinez, Pleasanton, and Dublin, just east of the hills that ring San Francisco Bay) March 14, 1998: split of 510; 926: not in use; available for geographic assignment 927: not in use; available for geographic ...
Area codes 213, 323, and 738; Area codes 310 and 424; Area codes 408 and 669; Area codes 415 and 628; Area codes 510 and 341; Area code 530; Area code 559; Area code 562; Area codes 619 and 858; Area code 626; Area code 650; Area codes 714 and 657; Area code 661; Area codes 707 and 369; Area codes 818 and 747; Area codes 760 and 442; Area codes ...
This is a list of future area codes in the North American Numbering Plan (NANP) that are in the planning stages for relief of central office code exhaustion in the given numbering plan areas (NPAs). The dates are subject to change during implementation as published in the official NANP Administrator Planning Letters .