Local Calling Guide

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

NXX: 616

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-616 A Littleton NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-616 0 Littleton NH   637E ONVOY, LLC - NH 122   2024-11-22   
603-616 1 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 2 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 3 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 4 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 5 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 6 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 7 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 8 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      
603-616 9 Littleton NH   6290 UNITED STATES CELLULAR - NH 122      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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