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]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-998 A Laconia NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-999 A Salem NH MNCHNHCO26Z  965H FRACTEL, LLC 122      

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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