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: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
415-204 A San Francisco: Central DA CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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