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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Switch: SNJSCAYB0MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
925-839 2 Martinez CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-839 9 Martinez CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-844 A Clayton CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-844 9 Clayton CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-849 A Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-849 1 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-849 3 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-849 8 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-849 9 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-884 2 Bishop Ranch CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-887 1 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-887 2 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-887 3 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-887 5 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-887 7 Concord CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-889 1 Clayton CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-891 6 Walnut Creek CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-892 1 Pleasanton CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-954 A Walnut Creek CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-954 0 Walnut Creek CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
925-954 2 Walnut Creek CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      

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Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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