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.

OCN: 7757 ATX TELECOMMUNICATIONS SERVICES, LTD. - PA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
610-784 0 Philadelphia Suburban Zone 23 PA   228      
610-784 2 Philadelphia Suburban Zone 23 PA   228      
610-784 3 Philadelphia Suburban Zone 23 PA   228      
610-784 4 Philadelphia Suburban Zone 23 PA   228      
610-784 5 Philadelphia Suburban Zone 23 PA   228      
610-784 6 Philadelphia Suburban Zone 23 PA   228      
610-784 8 Philadelphia Suburban Zone 23 PA   228      
610-790 0 Reading PA   228      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.