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-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
254-359 A Donie TX DONITXXADS0  556      
254-764 A Alexander TX CRTOTXXADS0  552      
254-785 A Carlton TX CRTOTXXADS0  552      
325-288 A Maryneal TX MRYNTXXADS0  550      
325-962 A McCaulley TX SYLVTXXADS0  550      
325-993 A Sylvester TX SYLVTXXADS0  550      
830-934 A Knippa TX KNPPTXXADS0  566      
956-417 A Dolores TX DLRSTXXADS0  566      
956-418 A Dolores TX DLRSTXXADS0  566      
956-419 A Dolores TX DLRSTXXADS0  566      
956-799 A Dolores TX DLRSTXXADS0  566      

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.