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: 346

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-346 A Boston MA SOVLMAAB0MD  148J TELENGY LLC 128      
857-346 0 Boston MA SOVLMAAB0MD  148J TELENGY LLC 128   2018-07-07   
857-346 1 Boston MA CMBRMABE5MD  551G NUSO, LLC 128   2018-07-22   
857-346 2 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2018-07-22   
857-346 3 Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128   2018-07-14   
857-346 4 Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128   2018-07-14   
857-346 5 Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128   2018-07-14   
857-346 6 Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128   2018-08-02   
857-346 7 Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128   2018-08-02   
857-346 8 Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128   2018-08-02   
857-346 9 Boston MA NRTNMAAACM4  5562 METROPCS, INC. 128   2018-08-02   

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

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