Local Calling Guide

Area code/prefix search

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

NXX: 684

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-684 A Lancaster NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-684 0 Lancaster NH   9827 OTEL TELEKOM, INC. - NH 122   2005-01-20   
603-684 1 Lancaster NH   145J TERRA NOVA TELECOM INC. 122   2023-04-27   
603-684 2 Lancaster NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-15   
603-684 3 Lancaster NH   073H TELNYX LLC 122   2024-07-27   
603-684 4 Lancaster NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-684 6 Lancaster NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2003-12-16   
603-684 8 Lancaster NH   6386 BELL ATLANTIC MOBILE, INC 122   2016-11-16   
603-684 9 Lancaster NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-05-17   

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

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