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: 523

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-523 A Santa Clarita: Saugus Canyon Country DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
661-523 0 Santa Clarita: Saugus Canyon Country DA CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2014-12-02   
661-523 1 Santa Clarita: Saugus Canyon Country DA CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2014-12-02   
661-523 2 Santa Clarita: Saugus Canyon Country DA CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-02-21   
661-523 3 Santa Clarita: Saugus Canyon Country DA CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-02-21   
661-523 4 Santa Clarita: Saugus Canyon Country DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-06-12   
661-523 5 Santa Clarita: Saugus Canyon Country DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-06-12   
661-523 6 Santa Clarita: Saugus Canyon Country DA CA SIMICACNGT1  899D METROPCS NETWORKS, LLC 730   2015-06-16   
661-523 7 Santa Clarita: Saugus Canyon Country DA CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2015-05-28   
661-523 8 Santa Clarita: Saugus Canyon Country DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-03-17   
661-523 9 Santa Clarita: Saugus Canyon Country DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-11-22   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.