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: 236

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-236 A Novato CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
628-236 0 Novato CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2016-04-04   
628-236 1 Novato CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-08-20   
628-236 2 Novato CA SNJSCAYB0MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722   2016-05-16   
628-236 3 Novato CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-08-20   
628-236 4 Novato CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-08-20   
628-236 5 Novato CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-08-20   
628-236 6 Novato CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2016-05-27   
628-236 7 Novato CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2016-07-28   
628-236 8 Novato CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2018-07-06   
628-236 9 Novato CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2016-04-03   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.