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: 487

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-487 A New Boston NH NBTNNHHPRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-487 0 New Boston NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2017-07-31   
603-487 1 New Boston NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2006-10-31   
603-487 2 New Boston NH NBTNNHHPRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-487 3 New Boston NH NBTNNHHPRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-487 5 New Boston NH NBTNNHHPRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-487 6 New Boston NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-12   
603-487 7 New Boston NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2016-04-15   
603-487 9 New Boston NH NBTNNHHPRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122   2014-06-21   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.