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: 277

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-277 A Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-277 0 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2006-10-14   
857-277 1 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2006-10-15   
857-277 2 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-03-18   
857-277 3 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-03-18   
857-277 4 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-03-18   
857-277 5 Boston MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-08-30   
857-277 6 Boston MA CMBRMAWA0MD  3370 CTC COMMUNICATIONS CORP. - MA 128   2006-07-12   
857-277 7 Boston MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-08-30   
857-277 8 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-10-08   
857-277 9 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-10-08   

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

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