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: 279 [Rate centres in NPA 279] [Dial plan for NPA 279]

NXX: 217

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
279-217 A South Placer CA SCRMCA01XSY  649C ONVOY, LLC - CA 726      
279-217 0 South Placer CA   981E BANDWIDTH.COM CLEC, LLC - CA 726   2021-05-07   
279-217 1 South Placer CA   981E BANDWIDTH.COM CLEC, LLC - CA 726   2021-05-07   
279-217 2 South Placer CA   6010 NEW CINGULAR WIRELESS PCS, LLC 726   2025-03-10   
279-217 3 South Placer CA   649C ONVOY, LLC - CA 726   2021-07-12   
279-217 4 South Placer CA   649C ONVOY, LLC - CA 726   2021-07-12   
279-217 5 South Placer CA   649C ONVOY, LLC - CA 726   2021-07-12   
279-217 6 South Placer CA   649C ONVOY, LLC - CA 726   2021-07-12   
279-217 7 South Placer CA   649C ONVOY, LLC - CA 726   2021-03-29   
279-217 8 South Placer CA   649C ONVOY, LLC - CA 726   2021-08-08   
279-217 9 South Placer CA   649C ONVOY, LLC - CA 726   2021-08-08   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.