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: 831 [Rate centres in NPA 831] [Dial plan for NPA 831]

NXX: 665

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-665 A Hollister CA SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-665 0 Hollister CA   145J TERRA NOVA TELECOM INC. 736   2024-02-12   
831-665 1 Hollister CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2017-05-11   
831-665 2 Hollister CA SLNSCA01XQX  5562 METROPCS, INC. 736   2017-12-24   
831-665 3 Hollister CA SLNSCA01XQX  6529 T-MOBILE USA, INC. 736   2020-12-18   
831-665 5 Hollister CA MTRYCAPM5MD  145J TERRA NOVA TELECOM INC. 736   2023-06-24   
831-665 6 Hollister CA SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736   2012-01-08   
831-665 7 Hollister CA   649C ONVOY, LLC - CA 736   2024-02-29   
831-665 8 Hollister CA   649C ONVOY, LLC - CA 736   2024-02-29   
831-665 9 Hollister CA SLNSCA01XQX  6529 T-MOBILE USA, INC. 736   2021-11-25   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.