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: 474

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-474 A Delano CA BKFDCAJAAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734      
661-474 0 Delano CA BKFDCAJAAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2010-05-03   
661-474 1 Delano CA BKFDCA01X2X  5562 METROPCS, INC. 734   2011-02-07   
661-474 2 Delano CA BKFDCA01X0X  516C AT&T CORP. 734   2010-11-30   
661-474 3 Delano CA BKFDCA01X2X  6529 T-MOBILE USA, INC. 734   2011-02-03   
661-474 4 Delano CA BKFDCA11EMD  981E BANDWIDTH.COM CLEC, LLC - CA 734   2010-07-02   
661-474 5 Delano CA BKFDCA01X2X  5562 METROPCS, INC. 734   2011-06-18   
661-474 6 Delano CA BKFDCA119MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734   2011-04-07   
661-474 7 Delano CA BKFDCAJAAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2010-12-05   
661-474 8 Delano CA BKFDCA01X2X  5562 METROPCS, INC. 734   2011-06-18   
661-474 9 Delano CA BKFDCAJAAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2011-06-21   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.