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: 626 [Rate centres in NPA 626] [Dial plan for NPA 626]

NXX: 581

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
626-581 A La Puente CA LAPNCAXFDS1  2319 FRONTIER CALIFORNIA INC. 730      
626-581 0 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      
626-581 1 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      
626-581 2 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      
626-581 3 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      
626-581 4 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      
626-581 5 La Puente CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2009-04-19   
626-581 6 La Puente CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-02-27   
626-581 7 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      
626-581 8 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      
626-581 9 La Puente CA   2319 FRONTIER CALIFORNIA INC. 730      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.