Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 415 [Rate centres in NPA 415] [Dial plan for NPA 415]

NXX: 921

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
415-921 A San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 0 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 1 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 2 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 3 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 4 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 5 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 6 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 7 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 8 San Francisco: Central DA CA SNFCCA12DS1  9740 PACIFIC BELL 722      
415-921 9 San Francisco: Central DA CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2013-01-11   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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