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.

NPA: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

NXX: 888

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-888 A Groveland CA SKTNCACZ7MD  145J TERRA NOVA TELECOM INC. 738      
350-888 0 Groveland CA   939H COMMIO, LLC 738   2022-12-05   
350-888 1 Groveland CA SKTNCA01XIZ  073H TELNYX LLC 738   2022-12-05   
350-888 2 Groveland CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2023-12-11   
350-888 6 Groveland CA SKTNCA01XPY  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2023-01-17   
350-888 8 Groveland CA   145J TERRA NOVA TELECOM INC. 738   2022-12-04   
350-888 9 Groveland CA SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738   2022-12-05   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.