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: 443

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-443 A Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-443 0 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-443 1 Walker Basin CA BKFDCA11EMD  981E BANDWIDTH.COM CLEC, LLC - CA 734   2017-07-20   
661-443 2 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2019-02-22   
661-443 3 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2014-01-07   
661-443 4 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2019-02-22   
661-443 5 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2020-05-04   
661-443 6 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2020-05-04   
661-443 7 Walker Basin CA BKFDCA11XMD  508J CENTURYLINK COMMUNICATIONS, LLC 734   2015-05-05   
661-443 8 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2021-03-05   
661-443 9 Walker Basin CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2021-03-05   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.