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: 797

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-797 A Plaistow NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-797 0 Plaistow NH   829J PAETEC ITEL, LLC 122   2001-03-26   
603-797 1 Plaistow NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2024-09-09   
603-797 8 Plaistow NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-03-31   
603-797 9 Plaistow NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      

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

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