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: 844

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-844 A Big Sur CA MTRYCAPM7MD  516J TON80 COMMUNICATIONS, LLC 736      
831-844 0 Big Sur CA MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736      
831-844 3 Big Sur CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2019-03-21   
831-844 4 Big Sur CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2019-03-21   
831-844 6 Big Sur CA MTRYCAPM7MD  516J TON80 COMMUNICATIONS, LLC 736   2021-06-27   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.