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: 338

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-338 A Keene NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-338 0 Keene NH MNCHNHCOXPZ  853C TIME WARNER CABLE INFORMATION SVCS (NEW HAMPSHIRE) 122   2015-09-14   
603-338 1 Keene NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-09-30   
603-338 2 Keene NH MNCHNHCO23Z  073H TELNYX LLC 122   2022-10-08   
603-338 3 Keene NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2023-04-06   
603-338 4 Keene NH PTMONH07DS1  9827 OTEL TELEKOM, INC. - NH 122   2002-09-19   
603-338 5 Keene NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2004-02-10   
603-338 6 Keene NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2022-11-26   
603-338 7 Keene NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2016-04-24   
603-338 8 Keene NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-02-28   
603-338 9 Keene NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.