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: 639

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-639 A Cambridge MA SOVLMAABCMD  516J TON80 COMMUNICATIONS, LLC 128      
857-639 0 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2022-05-20   
857-639 1 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-08-17   
857-639 2 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2022-05-22   
857-639 3 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2022-05-22   
857-639 4 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2022-05-22   
857-639 5 Cambridge MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2022-10-21   
857-639 6 Cambridge MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2022-10-21   
857-639 7 Cambridge MA SOVLMAABCMD  516J TON80 COMMUNICATIONS, LLC 128   2022-04-18   
857-639 8 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-08-17   
857-639 9 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-08-17   

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

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