Local Calling Guide

Area code/prefix search

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

NXX: 815

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-815 A Durham NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-815 0 Durham NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-815 1 Durham NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-815 2 Durham NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-815 4 Durham NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-815 8 Durham NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-815 9 Durham NH MNCHNHCO23Z  073H TELNYX LLC 122      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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