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: 328

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-328 A Boston MA   597F VOIP INNOVATIONS, LLC 128   2019-08-16   
857-328 0 Boston MA   892D ONVOY, LLC - MA 128   2020-05-18   
857-328 1 Boston MA   597F VOIP INNOVATIONS, LLC 128   2019-08-16   
857-328 2 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2019-08-17   
857-328 3 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2019-08-17   
857-328 4 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2019-08-17   
857-328 5 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2019-08-17   
857-328 6 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2019-08-17   
857-328 7 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2019-08-17   
857-328 8 Boston MA   892D ONVOY, LLC - MA 128   2020-05-18   
857-328 9 Boston MA   892D ONVOY, LLC - MA 128   2020-05-18   

Last updated: Sat, 31 Oct 2020 19:28:10 UTC

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