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: 856

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-856 A Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-856 0 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2018-11-17   
857-856 1 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2018-11-17   
857-856 2 Cambridge MA   829J PAETEC ITEL, LLC 128   2016-02-04   
857-856 3 Cambridge MA   829J PAETEC ITEL, LLC 128   2016-02-04   
857-856 4 Cambridge MA   829J PAETEC ITEL, LLC 128   2016-02-04   
857-856 5 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-05-09   
857-856 6 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-05-09   
857-856 7 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-05-09   
857-856 8 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-05-09   
857-856 9 Cambridge MA   515J IP HORIZON LLC 128   2019-04-26   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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