Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 415 [Rate centres in NPA 415] [Dial plan for NPA 415]

NXX: 575

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
415-575 A San Francisco: Central DA CA SNFCCA04DS1  9740 PACIFIC BELL 722      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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