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: 241

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-241 A Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
857-241 0 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2007-04-07   
857-241 1 Boston MA   4536 XO MASSACHUSETTS, INC. 128   2007-06-08   
857-241 2 Boston MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2007-09-28   
857-241 3 Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-12-18   
857-241 4 Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-12-18   
857-241 5 Boston MA   4536 XO MASSACHUSETTS, INC. 128   2007-06-08   
857-241 6 Boston MA   6664 SPRINT SPECTRUM L.P. 128   2007-10-03   
857-241 7 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2007-11-12   
857-241 8 Boston MA   6664 SPRINT SPECTRUM L.P. 128   2007-04-19   
857-241 9 Boston MA   6664 SPRINT SPECTRUM L.P. 128   2007-04-19   

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

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