Local Calling Guide

Area code/prefix search

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

NXX: 223

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-223 A Boston MA CMBRMAWA0MD  3370 CTC COMMUNICATIONS CORP. - MA 128      
857-223 1 Boston MA CMBRMAWA0MD  3370 CTC COMMUNICATIONS CORP. - MA 128      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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