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: 661 [Rate centres in NPA 661] [Dial plan for NPA 661]

NXX: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-637 A Bakersfield: Main DA CA BKFDCA12DS0  9740 PACIFIC BELL 734      
661-637 0 Bakersfield: Main DA CA BKFDCA12DS0  9740 PACIFIC BELL 734      
661-637 1 Bakersfield: Main DA CA BKFDCA12DS0  9740 PACIFIC BELL 734      
661-637 2 Bakersfield: Main DA CA BKFDCA12DS0  9740 PACIFIC BELL 734      
661-637 3 Bakersfield: Main DA CA BKFDCA11X7X  624H ONVOY SPECTRUM, LLC 734   2021-11-13   
661-637 4 Bakersfield: Main DA CA BKFDCA12DS0  9740 PACIFIC BELL 734      
661-637 5 Bakersfield: Main DA CA BKFDCA01VMD  6529 T-MOBILE USA, INC. 734   2019-08-30   
661-637 6 Bakersfield: Main DA CA BKFDCA01VMD  6529 T-MOBILE USA, INC. 734   2019-08-30   
661-637 7 Bakersfield: Main DA CA BKFDCA12DS0  9740 PACIFIC BELL 734      
661-637 8 Bakersfield: Main DA CA BKFDCA12DS0  9740 PACIFIC BELL 734      
661-637 9 Bakersfield: Main DA CA BKFDCAJAAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2012-08-23   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.