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.

NPA: 610 [Rate centres in NPA 610] [Dial plan for NPA 610]

NXX: 423

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
610-423 A Exton PA   829J PAETEC ITEL, LLC 228   2025-03-11   
610-423 0 Exton PA PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2004-11-02   
610-423 1 Exton PA PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2004-11-02   
610-423 2 Exton PA PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2004-11-02   
610-423 3 Exton PA PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2004-11-02   
610-423 4 Exton PA   829J PAETEC ITEL, LLC 228      
610-423 5 Exton PA PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2004-11-02   
610-423 6 Exton PA   829J PAETEC ITEL, LLC 228      
610-423 7 Exton PA PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2004-11-02   
610-423 8 Exton PA   829J PAETEC ITEL, LLC 228      
610-423 9 Exton PA IRTNPAXIDS2  8320 SERVICE ELECTRIC TELEPHONE COMPANY, LLC 228   2003-02-05   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.