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: SNRSCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
707-537 A Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 0 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 1 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 2 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 3 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 4 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 6 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 7 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 8 Santa Rosa CA 9740 PACIFIC BELL 722      
707-537 9 Santa Rosa CA 9740 PACIFIC BELL 722      
707-538 A Santa Rosa CA 9740 PACIFIC BELL 722      
707-539 A Santa Rosa CA 9740 PACIFIC BELL 722      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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