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: 500

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-500 A Cambridge MA WRXBMAWACM2  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128      
857-500 0 Cambridge MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2014-05-01   
857-500 1 Cambridge MA   6664 SPRINT SPECTRUM L.P. 128   2011-11-29   
857-500 2 Cambridge MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2014-07-01   
857-500 3 Cambridge MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2013-02-15   
857-500 4 Cambridge MA   4536 XO MASSACHUSETTS, INC. 128   2011-11-29   
857-500 5 Cambridge MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2013-08-15   
857-500 6 Cambridge MA   4536 XO MASSACHUSETTS, INC. 128   2011-11-29   
857-500 7 Cambridge MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2014-09-01   
857-500 8 Cambridge MA   966G LOCAL ACCESS LLC - MA 128   2013-08-08   
857-500 9 Cambridge MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2013-10-11   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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