Local Calling Guide

Area code/prefix search

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NPA: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX: 957

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-957 A Melrose MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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