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: PHLAPAMKX7X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
267-527 A Philadelphia Suburban Zone 41 PA 321J HD CARRIER LLC 228      
267-667 A Philadelphia Zone 1 PA 321J HD CARRIER LLC 228      
267-947 A Philadelphia Suburban Zone 38 PA 321J HD CARRIER LLC 228      
302-617 A Wilmington DE 321J HD CARRIER LLC 228      
484-481 A West Chester PA 321J HD CARRIER LLC 228      
484-740 A Reading PA 321J HD CARRIER LLC 228      
484-990 A Bethlehem PA 321J HD CARRIER LLC 228      
484-998 A Center Point PA 321J HD CARRIER LLC 228      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.