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: 641

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-641 A Edwards CA BKFDCA11XIX  622J SKYE TELECOM LLC DBA SKYETEL 734      
661-641 0 Edwards CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-641 1 Edwards CA BKFDCA11XIX  622J SKYE TELECOM LLC DBA SKYETEL 734   2021-11-01   
661-641 4 Edwards CA BKFDCA119MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734   2005-07-30   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.