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: 690

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-690 A Claremont NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-690 0 Claremont NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2021-10-09   
603-690 2 Claremont NH   829J PAETEC ITEL, LLC 122   2001-09-10   
603-690 3 Claremont NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2025-03-14   
603-690 5 Claremont NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122   2005-09-22   
603-690 7 Claremont NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2024-09-09   
603-690 8 Claremont NH MNCHNHCO23Z  073H TELNYX LLC 122   2022-11-03   
603-690 9 Claremont NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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