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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.
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 ...
If this map is the primary area code map of California (master map), no area code appears in red. Map is correct as of 2023-07-02. To make changes, updates, and replacing the lesser maps (the ones for a specific area code block), this file uses CSS to define the colors for each region.
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 ...
The current area code is “in high demand” and is expected to be depleted by September 2025. A new area code is coming to Northern California. Who gets access to the new phone numbers?
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.
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On March 1, 1959, area code 707 was created from the northern part, and area code 408 was created for San Jose, the South Bay, the Monterey Bay, and the Salinas Valley. [5] (408 has since been split to 831 and overlaid with 669.) On September 2, 1991, area code 510 was created for the East Bay, including Oakland. [6] (510 has since been split ...