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: 278

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
279-278 A Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726      
279-278 0 Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2024-09-10   
279-278 1 Folsom CA WSCRCAKE1MD  6529 T-MOBILE USA, INC. 726   2021-04-08   
279-278 2 Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2021-03-25   
279-278 3 Folsom CA WSCRCAKE1MD  6529 T-MOBILE USA, INC. 726   2021-04-08   
279-278 4 Folsom CA WSCRCAKE1MD  6529 T-MOBILE USA, INC. 726   2021-04-08   
279-278 5 Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2021-03-25   
279-278 6 Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2021-03-25   
279-278 7 Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2021-03-25   
279-278 8 Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2021-03-25   
279-278 9 Folsom CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2021-06-01   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.