Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Charlestown, MA

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
857-971 5 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-06-08   
857-971 6 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-06-08   
857-971 7 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-06-08   
857-971 8 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-08-05   
857-971 9   515J IP HORIZON LLC 128   2017-07-02   

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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