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: 316

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-316 A Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-316 0 Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2017-11-30   
603-316 1 Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-01-04   
603-316 2 Milford NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2021-08-02   
603-316 3 Milford NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2021-05-07   
603-316 4 Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-10-05   
603-316 5 Milford NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2022-01-15   
603-316 6 Milford NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2021-08-02   
603-316 7 Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2020-12-25   
603-316 8 Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-05-18   
603-316 9 Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2021-08-24   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.