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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-705 1 Chualar CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2020-03-09   
831-741 1 Castroville CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-03-05   
831-744 8 Gonzales CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-03-05   
831-778 9 San Lucas CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-03-05   
831-808 2 Soledad CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2024-11-19   
831-830 9 King City CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2021-03-21   
831-855 A Monterey CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736      
831-855 0 Monterey CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736      
831-855 4 Monterey CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2019-07-07   
831-855 9 Monterey CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2019-12-22   
831-902 4 Hollister CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2019-12-21   
831-921 1 Tres Pinos CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-03-05   
831-996 9 Tres Pinos CA 373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2020-04-08   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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