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: 283

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-283 A Keene NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-283 0 Keene NH   829J PAETEC ITEL, LLC 122   2000-08-09   
603-283 1 Keene NH   829J PAETEC ITEL, LLC 122   2001-05-01   
603-283 2 Keene NH   829J PAETEC ITEL, LLC 122   2006-03-07   
603-283 3 Keene NH   829J PAETEC ITEL, LLC 122   2006-09-07   
603-283 4 Keene NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2003-12-16   
603-283 5 Keene NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2007-03-30   
603-283 6 Keene NH   829J PAETEC ITEL, LLC 122      
603-283 7 Keene NH   829J PAETEC ITEL, LLC 122      
603-283 8 Keene NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2009-01-05   
603-283 9 Keene NH   829J PAETEC ITEL, LLC 122   2005-11-25   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.