Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 757

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-757 A Cambridge MA CMBRMABEIMD  756G WIDE VOICE, LLC - MA 128      
857-757 0 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2022-05-20   
857-757 1 Cambridge MA CMBRMABEIMD  756G WIDE VOICE, LLC - MA 128   2015-06-02   
857-757 2 Cambridge MA SOVLMAAB5MD  732H BARR TELL USA, INC. - MA 128   2015-12-31   
857-757 3 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-12-06   
857-757 4 Cambridge MA BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128   2018-02-22   
857-757 5 Cambridge MA BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128   2018-02-22   
857-757 6 Cambridge MA BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128   2018-02-22   
857-757 7 Cambridge MA BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128   2018-02-22   
857-757 8 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2018-12-20   
857-757 9 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2018-12-20   

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

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