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: 593

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-593 A Jaffrey NH MNCHNHCOX9Y  2698 CTC COMMUNICATIONS CORP. - NH 122      
603-593 0 Jaffrey NH MNCHNHCOX9Y  4286 LIGHTSHIP TELECOM, LLC - NH 122      
603-593 1 Jaffrey NH MNCHNHCOX9Y  2698 CTC COMMUNICATIONS CORP. - NH 122      
603-593 2 Jaffrey NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-593 3 Jaffrey NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-593 4 Jaffrey NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-593 5 Jaffrey NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-593 6 Jaffrey NH PTMONH07DS1  9827 OTEL TELEKOM, INC. - NH 122      
603-593 7 Jaffrey NH   073H TELNYX LLC 122      
603-593 8 Jaffrey NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-593 9 Jaffrey NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.