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: 477

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-477 A Jamaica Plain MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-477 0 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-12   
857-477 1 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-12   
857-477 2 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-12   
857-477 3 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-12   
857-477 4 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-12   
857-477 5 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-16   
857-477 6 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-12   
857-477 7 Jamaica Plain MA   892D ONVOY, LLC - MA 128   2016-04-11   
857-477 8 Jamaica Plain MA   892D ONVOY, LLC - MA 128   2016-04-11   
857-477 9 Jamaica Plain MA   321J HD CARRIER LLC 128   2016-04-12   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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