Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX: 455

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-455 A Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-455 0 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 1 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 2 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 3 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 4 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 5 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 6 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 7 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 8 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      
603-455 9 Laconia NH   6290 UNITED STATES CELLULAR - NH 122      

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

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