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: 623

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-623 A Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 0 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 1 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 2 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 3 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 4 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 5 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 6 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 7 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 8 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      
661-623 9 Taft CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.