Local Calling Guide

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

NXX: 574

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-574 A East Boston MA CMBRMAWA0MD  3370 CTC COMMUNICATIONS CORP. - MA 128      
857-574 0 East Boston MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2008-12-06   
857-574 1 East Boston MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-03-15   
857-574 2 East Boston MA CMBRMAMQDS3  316E YMAX COMMUNICATIONS CORP. - MA 128   2008-09-28   
857-574 3 East Boston MA BSTNMACODS2  7135 TC SYSTEMS, INC. 128   2009-08-13   
857-574 4 East Boston MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-04-07   
857-574 5 East Boston MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-07-03   
857-574 6 East Boston MA CMBRMAMQDS3  316E YMAX COMMUNICATIONS CORP. - MA 128   2011-01-24   
857-574 7 East Boston MA CMBRMA01DS4  7421 AT&T - LOCAL 128   2001-06-28   
857-574 8 East Boston MA CMBRMAWA0MD  3370 CTC COMMUNICATIONS CORP. - MA 128   2001-09-24   
857-574 9 East Boston MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-06-03   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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