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: 333

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-333 A Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-333 0 Boston MA   5562 METROPCS, INC. 128   2011-02-18   
857-333 1 Boston MA   5562 METROPCS, INC. 128   2011-02-18   
857-333 2 Boston MA   5562 METROPCS, INC. 128   2011-02-18   
857-333 3 Boston MA   5562 METROPCS, INC. 128   2011-02-18   
857-333 4 Boston MA   5562 METROPCS, INC. 128   2011-02-18   
857-333 5 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2012-12-16   
857-333 6 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2012-12-16   
857-333 7 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2012-12-16   
857-333 8 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2012-12-16   
857-333 9 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2011-01-07   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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