Local Calling Guide

Area code/prefix search

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

NXX: 687

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-687 A Jackson NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-687 0 Jackson NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-687 2 Jackson NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-687 4 Jackson NH   145J TERRA NOVA TELECOM INC. 122   2025-10-21   
603-687 9 Jackson NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

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