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Area codes 415 and 628
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{{short description|Area codes for San Francisco and Marin County, California}} {{California area codes image map|415 and 628}} '''Area codes 415 and 628''' are [[telephone]] [[area code]]s in the [[North American Numbering Plan]] (NANP) for the city of [[San Francisco]] and its northern suburbs in [[Marin County, California|Marin County]] (across the [[Golden Gate]]), and the northeast corner of [[San Mateo County, California|San Mateo County]] in the U.S. state of [[California]]. Area code 415 was one of the eighty-six [[original North American area codes]] established in 1947, but modified in geographic configuration later. Area code 628 was assigned in 2015 to form an [[overlay plan|overlay]] in that numbering plan area in mitigation of central office prefix exhaustion.
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