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: SNTDCABLPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-767 A San Francisco: Central DA CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-283 A Petaluma: Main DA CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-284 A Santa Rosa CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-285 A Petaluma: Swift DA CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-385 A Healdsburg CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-595 A Santa Rosa CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-636 A Santa Rosa CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-687 A Windsor CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      
707-861 A Sebastopol CA 7174 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 722      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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