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: 545

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-545 A Concord NH MNCHNHCOX9Y  4286 LIGHTSHIP TELECOM, LLC - NH 122      
603-545 0 Concord NH MNCHNHCOX9Y  4286 LIGHTSHIP TELECOM, LLC - NH 122      
603-545 1 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-545 2 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-545 3 Concord NH MNCHNHCOX9Y  4286 LIGHTSHIP TELECOM, LLC - NH 122      
603-545 4 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-545 5 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-545 6 Concord NH MNCHNHCOX9Y  4286 LIGHTSHIP TELECOM, LLC - NH 122      
603-545 7 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-545 8 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-545 9 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.