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: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-387 A Quincy MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
857-387 0 Quincy MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2024-01-07   
857-387 1 Quincy MA   892D ONVOY, LLC - MA 128   2024-02-25   
857-387 2 Quincy MA   318J COMCAST IP PHONE, LLC 128   2021-11-01   
857-387 3 Quincy MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2022-11-17   
857-387 4 Quincy MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2022-11-17   
857-387 5 Quincy MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2022-11-17   
857-387 6 Quincy MA   516J TON80 COMMUNICATIONS, LLC 128   2022-03-13   
857-387 7 Quincy MA   624H ONVOY SPECTRUM, LLC 128   2022-02-07   
857-387 8 Quincy MA   624H ONVOY SPECTRUM, LLC 128   2022-02-07   
857-387 9 Quincy MA   892D ONVOY, LLC - MA 128   2024-02-25   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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