Local Calling Guide

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

NXX: 393

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-393 A Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 0 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-09-01   
603-393 1 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-12-03   
603-393 2 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-12-04   
603-393 3 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-06-05   
603-393 4 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-02-02   
603-393 5 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 6 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 7 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 8 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 9 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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