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: 414

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-414 A Sunapee NH CNTCNHXAGT1  853H TDS METROCOM, LLC - NH 122      
603-414 0 Sunapee NH   073H TELNYX LLC 122      
603-414 1 Sunapee NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122      
603-414 2 Sunapee NH CNTCNHXAGT1  853H TDS METROCOM, LLC - NH 122      
603-414 3 Sunapee NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-414 6 Sunapee NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-414 7 Sunapee NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.