Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX: 842

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-842 A Dover NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-842 0 Dover NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2004-10-18   
603-842 1 Dover NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2020-12-05   
603-842 2 Dover NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2005-03-27   
603-842 3 Dover NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2005-10-16   
603-842 4 Dover NH   318J COMCAST IP PHONE, LLC 122   2007-05-21   
603-842 5 Dover NH   318J COMCAST IP PHONE, LLC 122   2007-05-21   
603-842 6 Dover NH   829J PAETEC ITEL, LLC 122      
603-842 7 Dover NH   637E ONVOY, LLC - NH 122   2023-06-12   
603-842 8 Dover NH   829J PAETEC ITEL, LLC 122      
603-842 9 Dover NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2011-07-14   

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

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