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: 481

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-481 A Plymouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-481 0 Plymouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-481 1 Plymouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-481 2 Plymouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-481 3 Plymouth NH   145J TERRA NOVA TELECOM INC. 122      
603-481 6 Plymouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-481 7 Plymouth NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122      
603-481 8 Plymouth NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.