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: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-708 A Canterbury NH MNCHNHIE2MD  4112 COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH 122   2005-04-11   
603-708 1 Canterbury NH   4112 COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH 122   2005-04-11   
603-708 2 Canterbury NH   4206 PAETEC COMMUNICATIONS, INC. - NH 122   2015-05-30   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.