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: 488

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-488 A Bedford NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-488 0 Bedford NH   829J PAETEC ITEL, LLC 122   2000-08-08   
603-488 1 Bedford NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-488 2 Bedford NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-488 5 Bedford NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-488 6 Bedford NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2007-12-11   
603-488 7 Bedford NH   145J TERRA NOVA TELECOM INC. 122   2025-08-30   
603-488 9 Bedford NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2024-12-28   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.