Local Calling Guide

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NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX: 294

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-294 A Portsmouth NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-294 0 Portsmouth NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2012-12-15   
603-294 1 Portsmouth NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2010-10-16   
603-294 2 Portsmouth NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2010-04-25   
603-294 3 Portsmouth NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2008-02-04   
603-294 4 Portsmouth NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-294 5 Portsmouth NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2008-09-03   
603-294 6 Portsmouth NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2010-07-12   
603-294 7 Portsmouth NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2010-07-12   
603-294 8 Portsmouth NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2010-07-12   
603-294 9 Portsmouth NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2014-10-14   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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