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: 770

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-770 A Boston MA   116E WEST TELECOM SERVICES, LLC - MA 128      
857-770 0 Boston MA   116E WEST TELECOM SERVICES, LLC - MA 128   2015-02-21   
857-770 1 Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-05-15   
857-770 2 Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2015-05-16   
857-770 3 Boston MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2015-06-18   
857-770 4 Boston MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2015-06-18   
857-770 5 Boston MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2015-06-18   
857-770 6 Boston MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2015-06-18   
857-770 7 Boston MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2015-06-18   
857-770 8 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2015-07-23   
857-770 9 Boston MA   116E WEST TELECOM SERVICES, LLC - MA 128   2015-02-21   

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

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