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: 579

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-579 A Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   
857-579 3 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   
857-579 4 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   
857-579 5 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   
857-579 6 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   
857-579 7 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   
857-579 8 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   
857-579 9 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2025-02-21   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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