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: 977

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-977 A Andover NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-977 0 Andover NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2010-01-25   
603-977 7 Andover NH MNCHNHCO26Z  965H FRACTEL, LLC 122   2020-07-06   
603-977 8 Andover NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2021-03-10   
603-977 9 Andover NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2021-03-10   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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