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: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-307 A North Conway NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-307 0 North Conway NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-307 1 North Conway NH   793K TWC IP ENABLED SERVICES, LLC 122      
603-307 2 North Conway NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122      
603-307 3 North Conway NH SALMNHNB5MD  9247 BROADVIEW NETWORKS, INC. - NH 122      
603-307 4 North Conway NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-307 5 North Conway NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-307 7 North Conway NH NCWYNHKERS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-307 8 North Conway NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-307 9 North Conway NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.