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: 393

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-393 A Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 0 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-09-01   
603-393 1 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-12-03   
603-393 2 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-12-04   
603-393 3 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-06-05   
603-393 4 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-02-02   
603-393 5 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 6 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 7 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 8 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 9 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.