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: 593

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-593 A Santa Clarita: Newhall-Castaic DA CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730      
661-593 0 Santa Clarita: Newhall-Castaic DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2016-09-12   
661-593 1 Santa Clarita: Newhall-Castaic DA CA LSANCARCD4S  973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-11-20   
661-593 2 Santa Clarita: Newhall-Castaic DA CA SIMICACNGT1  899D METROPCS NETWORKS, LLC 730   2016-12-31   
661-593 3 Santa Clarita: Newhall-Castaic DA CA SIMICACNGT1  899D METROPCS NETWORKS, LLC 730   2017-04-17   
661-593 4 Santa Clarita: Newhall-Castaic DA CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2017-06-10   
661-593 5 Santa Clarita: Newhall-Castaic DA CA LSANCAJW6MD  073H TELNYX LLC 730   2017-06-02   
661-593 6 Santa Clarita: Newhall-Castaic DA CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2019-05-26   
661-593 7 Santa Clarita: Newhall-Castaic DA CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2016-09-12   
661-593 8 Santa Clarita: Newhall-Castaic DA CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2016-12-09   
661-593 9 Santa Clarita: Newhall-Castaic DA CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2016-09-11   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.