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: SLNSCA01XAY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-204 4 Monterey CA 073H TELNYX LLC 736   2021-02-26   
831-230 5 Monterey CA 073H TELNYX LLC 736   2023-04-12   
831-230 9 Monterey CA 073H TELNYX LLC 736   2022-12-23   
831-243 7 Salinas CA 073H TELNYX LLC 736   2021-02-20   
831-276 A Salinas CA 073H TELNYX LLC 736      
831-276 7 Salinas CA 073H TELNYX LLC 736   2017-04-16   
831-303 1 San Ardo CA 073H TELNYX LLC 736   2021-02-26   
831-306 9 Chualar CA 073H TELNYX LLC 736   2023-06-25   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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