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: 628 [Rate centres in NPA 628] [Dial plan for NPA 628]

NXX: 261

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-261 A Sausalito CA SNJUCACL8MD  145J TERRA NOVA TELECOM INC. 722      
628-261 0 Sausalito CA   649C ONVOY, LLC - CA 722   2018-10-22   
628-261 1 Sausalito CA   649C ONVOY, LLC - CA 722   2018-10-22   
628-261 2 Sausalito CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2019-03-21   
628-261 3 Sausalito CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2019-03-21   
628-261 4 Sausalito CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2019-03-21   
628-261 5 Sausalito CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2019-03-21   
628-261 6 Sausalito CA   649C ONVOY, LLC - CA 722   2021-08-09   
628-261 7 Sausalito CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2019-03-21   
628-261 8 Sausalito CA   145J TERRA NOVA TELECOM INC. 722   2019-05-24   
628-261 9 Sausalito CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2019-05-24   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.