Local Calling Guide

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

NXX: 343

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-343 A Dover NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-343 0 Dover NH   9827 OTEL TELEKOM, INC. - NH 122   2004-10-09   
603-343 1 Dover NH   318J COMCAST IP PHONE, LLC 122      
603-343 2 Dover NH   318J COMCAST IP PHONE, LLC 122      
603-343 3 Dover NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2005-07-23   
603-343 4 Dover NH   318J COMCAST IP PHONE, LLC 122   2006-06-06   
603-343 5 Dover NH   318J COMCAST IP PHONE, LLC 122      
603-343 6 Dover NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2007-03-29   
603-343 7 Dover NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2007-12-21   
603-343 8 Dover NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2007-12-21   
603-343 9 Dover NH   829J PAETEC ITEL, LLC 122   2003-05-02   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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