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: 536

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-536 A Glennville CA GLVLCAXFRS9  4420 FRONTIER CALIFORNIA INC. 734      
661-536 1 Glennville CA BKFDCAKTX5X  145J TERRA NOVA TELECOM INC. 734      
661-536 2 Glennville CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-536 3 Glennville CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-536 4 Glennville CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-536 5 Glennville CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-536 6 Glennville CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-536 7 Glennville CA BKFDCA11XMD  508J CENTURYLINK COMMUNICATIONS, LLC 734      
661-536 8 Glennville CA GLVLCAXFRS9  4420 FRONTIER CALIFORNIA INC. 734      
661-536 9 Glennville CA   145J TERRA NOVA TELECOM INC. 734      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.