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: 318

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-318 A Nashua NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-318 0 Nashua NH PTMONH07DS1  9827 OTEL TELEKOM, INC. - NH 122      
603-318 1 Nashua NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2004-04-07   
603-318 2 Nashua NH MNCHNHCOXCZ  996E BANDWIDTH.COM CLEC, LLC - NH 122      
603-318 3 Nashua NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-318 4 Nashua NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2014-05-01   
603-318 5 Nashua NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2004-04-07   
603-318 6 Nashua NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2004-08-02   
603-318 7 Nashua NH SALMNHNB5MD  9247 BROADVIEW NETWORKS, INC. - NH 122   2004-11-09   
603-318 8 Nashua NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2006-02-03   
603-318 9 Nashua NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2006-02-25   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.