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: 295

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-295 A Durham NH   829J PAETEC ITEL, LLC 122   2025-04-30   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

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