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: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-678 A Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 0 Belmont MA SOVLMAAB3MD  197D VONAGE AMERICA LLC 128   2021-10-22   
857-678 1 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
857-678 2 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
857-678 3 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
857-678 4 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-13   
857-678 5 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-13   
857-678 6 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-13   
857-678 7 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-04   
857-678 8 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-13   
857-678 9 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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