Local Calling Guide

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

NXX: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-344 A Suncook NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-344 0 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 1 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 2 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 3 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 4 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 5 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 6 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 7 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 8 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      
603-344 9 Suncook NH   6290 UNITED STATES CELLULAR - NH 122      

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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