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: 755

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-755 A Farmington NH FRTNNHMGRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-755 0 Farmington NH   145J TERRA NOVA TELECOM INC. 122      
603-755 1 Farmington NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-755 2 Farmington NH FRTNNHMGRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-755 3 Farmington NH FRTNNHMGRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-755 4 Farmington NH FRTNNHMGRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-755 5 Farmington NH DOVRNHTH8MD  2698 CTC COMMUNICATIONS CORP. - NH 122      
603-755 6 Farmington NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-755 8 Farmington NH PTMONH07DS1  9827 OTEL TELEKOM, INC. - NH 122      
603-755 9 Farmington NH FRTNNHMGRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.