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.

Slatington, PA

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
610-978 4 PHLAPAMK17Z  784E BLOCK LINE SYSTEMS, LLC - PA 228   2010-04-26   
610-978 5 PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2016-03-28   
610-978 6 PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2016-03-28   
610-978 7 PHLAPAMKX4X  624H ONVOY SPECTRUM, LLC 228   2021-05-13   
610-978 8 PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2024-06-08   
610-978 9   547E ONVOY, LLC - PA 228   2025-03-09   

<< 1 2

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.