Local Calling Guide

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

NXX: 259

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-259 A Littleton NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-259 0 Littleton NH   9827 OTEL TELEKOM, INC. - NH 122   2004-10-09   
603-259 1 Littleton NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-15   
603-259 2 Littleton NH   9827 OTEL TELEKOM, INC. - NH 122   2002-09-19   
603-259 3 Littleton NH   145J TERRA NOVA TELECOM INC. 122   2024-10-12   
603-259 4 Littleton NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-259 5 Littleton NH   145J TERRA NOVA TELECOM INC. 122   2022-10-06   
603-259 6 Littleton NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-12-04   
603-259 7 Littleton NH   829J PAETEC ITEL, LLC 122   2007-01-05   
603-259 8 Littleton NH   073H TELNYX LLC 122   2024-06-30   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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