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: 835 [Rate centres in NPA 835] [Dial plan for NPA 835]

NXX: 299

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
835-299 A Philadelphia Suburban Zone 11 PA   547E ONVOY, LLC - PA 228   2026-10-16   
835-299 0 Philadelphia Suburban Zone 11 PA   547E ONVOY, LLC - PA 228   2026-10-16   
835-299 1 Philadelphia Suburban Zone 11 PA   547E ONVOY, LLC - PA 228   2026-10-16   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.