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: 721

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-721 A Milford NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-721 0 Milford NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2006-05-20   
603-721 1 Milford NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-721 2 Milford NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-721 3 Milford NH   829J PAETEC ITEL, LLC 122   2007-03-12   
603-721 4 Milford NH   829J PAETEC ITEL, LLC 122   2007-03-07   
603-721 5 Milford NH MNCHNHCO43Z  792K CHARTER IP ENABLED SERVICES, LLC 122   2011-09-03   
603-721 6 Milford NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-721 7 Milford NH   829J PAETEC ITEL, LLC 122   2011-09-12   
603-721 8 Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2024-11-25   
603-721 9 Milford NH MNCHNHCOCM1  5562 METROPCS, INC. 122      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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