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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SNFCCA01XGX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
925-794 6 Moraga CA 516C AT&T CORP. 722   2005-09-14   
925-822 3 Concord CA 516C AT&T CORP. 722   2006-07-07   
925-978 4 Antioch CA 516C AT&T CORP. 722   2006-07-07   

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

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