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: 746

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-746 A Contoocook NH CNTCNHXAPS0  0047 MERRIMACK COUNTY TEL. CO. 122      
603-746 0 Contoocook NH   318J COMCAST IP PHONE, LLC 122   2015-02-16   
603-746 1 Contoocook NH   318J COMCAST IP PHONE, LLC 122   2010-01-25   
603-746 2 Contoocook NH   0047 MERRIMACK COUNTY TEL. CO. 122      
603-746 3 Contoocook NH   0047 MERRIMACK COUNTY TEL. CO. 122      
603-746 4 Contoocook NH   0047 MERRIMACK COUNTY TEL. CO. 122      
603-746 5 Contoocook NH   0047 MERRIMACK COUNTY TEL. CO. 122      
603-746 6 Contoocook NH   0047 MERRIMACK COUNTY TEL. CO. 122      
603-746 8 Contoocook NH   0047 MERRIMACK COUNTY TEL. CO. 122      
603-746 9 Contoocook NH   0047 MERRIMACK COUNTY TEL. CO. 122      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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