Local Calling Guide

Area code/prefix search

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NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX: 575

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-575 A Littleton NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-575 0 Littleton NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-05-17   
603-575 1 Littleton NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-07-08   
603-575 4 Littleton NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2023-04-27   
603-575 5 Littleton NH MNCHNHCOXPZ  853C TIME WARNER CABLE INFORMATION SVCS (NEW HAMPSHIRE) 122   2012-10-02   
603-575 6 Littleton NH MNCHNHCOXAZ  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2013-10-21   
603-575 9 Littleton NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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