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: 760

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-760 A Buttonwillow CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-760 0 Buttonwillow CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734      
661-760 1 Buttonwillow CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734      
661-760 2 Buttonwillow CA   649C ONVOY, LLC - CA 734   2017-04-04   
661-760 3 Buttonwillow CA   981E BANDWIDTH.COM CLEC, LLC - CA 734   2022-02-07   
661-760 5 Buttonwillow CA   649C ONVOY, LLC - CA 734   2021-07-22   
661-760 6 Buttonwillow CA   649C ONVOY, LLC - CA 734   2019-02-22   
661-760 7 Buttonwillow CA   649C ONVOY, LLC - CA 734   2019-02-22   
661-760 8 Buttonwillow CA   490J DISH WIRELESS, LLC 734   2023-11-13   
661-760 9 Buttonwillow CA   649C ONVOY, LLC - CA 734   2021-10-29   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.