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: 723

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-723 A Berlin NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-723 0 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 1 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 2 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 3 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 4 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 5 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 6 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 7 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 8 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      
603-723 9 Berlin NH   6290 UNITED STATES CELLULAR - NH 122      

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

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