Local Calling Guide

Area code/prefix search

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

NXX: 336

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-336 A Hinsdale NH HNDLNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-336 1 Hinsdale NH MNCHNHCOX9Y  2698 CTC COMMUNICATIONS CORP. - NH 122   2004-04-04   
603-336 2 Hinsdale NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2012-04-10   
603-336 3 Hinsdale NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-04   
603-336 4 Hinsdale NH   145J TERRA NOVA TELECOM INC. 122   2021-05-27   
603-336 5 Hinsdale NH HNDLNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-336 6 Hinsdale NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2007-01-30   
603-336 7 Hinsdale NH HNDLNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-336 8 Hinsdale NH   145J TERRA NOVA TELECOM INC. 122   2022-01-04   
603-336 9 Hinsdale NH HNDLNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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