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Number pooling / Ten-digit dialing / Telephone numbering plan / California Public Utilities Commission / Communication / Information / Area codes 801 and 385 / Area codes 442 and 760 / North American Numbering Plan / Telephone numbers / Overlay plan


In 1947, when area codes were introduced to California, the locality now served by the 408 area code was part of the 415 area code, one of the first three area codes
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Document Date: 2014-09-12 01:32:48


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