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.

Switch: KGTNNHBADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
603-642 A Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 3 Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 4 Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 5 Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 6 Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 7 Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 8 Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 9 Kingston NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.