Local Calling Guide

Area code/prefix search

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NPA: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-257 A South Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128      
857-257 0 South Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128      
857-257 8 South Boston MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2024-03-07   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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