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In the initial configuration of the nationwide telephone numbering plan designed by AT&T in 1947, [1] the state of Oregon was assigned a single area code, 503. Despite Oregon's growth in the second half of the twentieth century, particularly in the Willamette Valley (Portland and Eugene), this remained so for 48 years, making Oregon one of the largest states by area with a single area code.
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. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state ...
This feature group 'B' has been rendered obsolete by 1010xxx "dial-around" feature group 'D', but the exchange remains reserved in each individual area code. 951: California (western Riverside County, including Riverside, Corona, California, Lake Elsinore, Mira Loma, Moreno Valley, Sun City, Temecula, Winchester, Lakeview, etc.) July 17, 2004
Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.
An area code overlay is a numbering plan area ... California and surrounding suburbs ... 503: Northwestern Oregon, ...
Starting next year, residents and business owners in northeastern California will have access to a new area code. The 530 area code — which includes Davis, El Dorado Hills, Oroville, Placerville ...
Area code 541 was created in an area code split from area code 503 on November 5, 1995. Area code 458 was added to the same service area on February 10, 2010 to form an overlay . History
This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021. [1] On June 8, 2023, the California Public Utilities Commission assigned area code 837 to overlay 530, effective January 31, 2025. [2] 837 will serve as California's 40th area code. As ten-digit dialing is already in effect, no permissive dialing ...