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: 412

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-412 A Plymouth NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-412 2 Plymouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-12-12   
603-412 4 Plymouth NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2021-06-06   
603-412 6 Plymouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2016-02-22   
603-412 7 Plymouth NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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