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.

Switch: PHLAPAFGZMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
835-215 A Allentown (Lehigh) PA 732J NUSO, LLC 228      
835-215 1 Allentown (Lehigh) PA 732J NUSO, LLC 228   2023-03-31   
835-234 3 Allentown (Lehigh) PA 732J NUSO, LLC 228   2023-12-10   
835-234 4 Allentown (Lehigh) PA 732J NUSO, LLC 228   2023-12-10   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.