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: 974

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-974 A Lancaster CA NHLLCA01DS0  7480 PACIFIC BELL (COMPETITIVE) 730      
661-974 0 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-07-24   
661-974 1 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-05-25   
661-974 2 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-05-25   
661-974 3 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-05-25   
661-974 4 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-07-24   
661-974 5 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-07-24   
661-974 6 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-07-24   
661-974 7 Lancaster CA NHLLCA01DS0  7480 PACIFIC BELL (COMPETITIVE) 730      
661-974 8 Lancaster CA NHLLCA01DS0  7480 PACIFIC BELL (COMPETITIVE) 730   2004-10-16   
661-974 9 Lancaster CA SIMICACNGT1  6529 T-MOBILE USA, INC. 730   2007-07-24   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.