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: 383

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-383 A Santa Clarita: Newhall-Castaic DA CA CSTCCA11DS0  9740 PACIFIC BELL 730      
661-383 0 Santa Clarita: Newhall-Castaic DA CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-05-21   
661-383 1 Santa Clarita: Newhall-Castaic DA CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-05-21   
661-383 2 Santa Clarita: Newhall-Castaic DA CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-05-21   
661-383 3 Santa Clarita: Newhall-Castaic DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2015-07-23   
661-383 4 Santa Clarita: Newhall-Castaic DA CA CSTCCA11DS0  9740 PACIFIC BELL 730   2015-03-19   
661-383 5 Santa Clarita: Newhall-Castaic DA CA CSTCCA11DS0  9740 PACIFIC BELL 730   2015-03-19   
661-383 6 Santa Clarita: Newhall-Castaic DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2015-08-16   
661-383 7 Santa Clarita: Newhall-Castaic DA CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2015-05-19   
661-383 8 Santa Clarita: Newhall-Castaic DA CA SIMICACNGT1  899D METROPCS NETWORKS, LLC 730   2016-04-25   
661-383 9 Santa Clarita: Newhall-Castaic DA CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2015-04-27   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.