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.

Harford, PA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
570-434 A FRCYPAXFDS1  0191 NORTH EASTERN PENNSYLVANIA TEL. CO. 232      
570-528 A WLBRPA04GT0  3806 CORE COMMUNICATIONS, INC. - PA 232      
570-528 0 WLBRPA04GT0  3806 CORE COMMUNICATIONS, INC. - PA 232   2009-05-16   
570-528 1 LWBGPAXL1MD  6921 LIMITLESS MOBILE, LLC 232   2018-01-02   
570-528 2 SCTNPASCX4Y  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 232   2017-04-30   
570-528 3   3806 CORE COMMUNICATIONS, INC. - PA 232   2018-06-11   
570-528 4   3806 CORE COMMUNICATIONS, INC. - PA 232   2018-06-11   
570-528 5   3806 CORE COMMUNICATIONS, INC. - PA 232   2018-06-11   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.