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: 948

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-948 A Rochester NH ROCHNHWE4MD  314C IDT AMERICA, CORP. - NH 122      
603-948 0 Rochester NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2011-03-29   
603-948 1 Rochester NH ROCHNHWE4MD  314C IDT AMERICA, CORP. - NH 122   2009-09-20   
603-948 2 Rochester NH ROCHNHWE4MD  314C IDT AMERICA, CORP. - NH 122   2008-04-13   
603-948 4 Rochester NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2023-01-04   
603-948 5 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2014-05-01   
603-948 6 Rochester NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2013-03-26   
603-948 7 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2014-11-01   
603-948 8 Rochester NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2013-10-19   
603-948 9 Rochester NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2014-09-24   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.