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: 903

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-903 A Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-903 0 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-903 1 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-903 2 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-903 3 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2008-04-17   
661-903 4 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2014-09-07   
661-903 5 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2015-06-11   
661-903 6 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-903 7 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2015-05-03   
661-903 8 Arvin CA BKFDCA119MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734   2009-08-10   
661-903 9 Arvin CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2014-03-16   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.