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: 317

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-317 A Boston MA BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128      
857-317 0 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2013-10-11   
857-317 1 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2013-10-11   
857-317 2 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2014-05-29   
857-317 3 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2014-05-29   
857-317 4 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2014-05-29   
857-317 5 Boston MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128   2015-01-14   
857-317 6 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2014-04-12   
857-317 7 Boston MA BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128   2013-05-31   
857-317 8 Boston MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-10-24   
857-317 9 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2014-08-23   

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

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