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: 371

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-371 A Watertown MA   892D ONVOY, LLC - MA 128      
857-371 0 Watertown MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-27   
857-371 1 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-22   
857-371 2 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-22   
857-371 3 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-22   
857-371 4 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-22   
857-371 5 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
857-371 6 Watertown MA   892D ONVOY, LLC - MA 128   2022-04-17   
857-371 7 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
857-371 8 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
857-371 9 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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