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      
603-575 1 Littleton NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-575 5 Littleton NH   793K TWC IP ENABLED SERVICES, LLC 122      
603-575 6 Littleton NH MNCHNHCOXAZ  4206 PAETEC COMMUNICATIONS, INC. - NH 122      
603-575 9 Littleton NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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