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: 833

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-833 A Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-833 0 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2004-12-03   
603-833 1 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2006-02-03   
603-833 2 Rochester NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2007-07-23   
603-833 3 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2007-01-02   
603-833 4 Rochester NH   145J TERRA NOVA TELECOM INC. 122   2022-08-04   
603-833 5 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2007-11-15   
603-833 6 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-07-03   
603-833 7 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-04-02   
603-833 8 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-10-02   
603-833 9 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2010-02-13   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.