Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
857-263 8 Boston MA 318J COMCAST IP PHONE, LLC 128   2011-09-07   
857-265 2 Boston MA 318J COMCAST IP PHONE, LLC 128   2012-09-21   
857-265 3 Boston MA 318J COMCAST IP PHONE, LLC 128   2012-09-21   
857-267 A Milton MA 318J COMCAST IP PHONE, LLC 128      
857-267 2 Milton MA 318J COMCAST IP PHONE, LLC 128   2013-09-14   
857-267 4 Milton MA 318J COMCAST IP PHONE, LLC 128   2014-01-19   
857-271 3 Dorchester MA 318J COMCAST IP PHONE, LLC 128   2013-10-03   
857-273 A Jamaica Plain MA 318J COMCAST IP PHONE, LLC 128      
857-273 2 Jamaica Plain MA 318J COMCAST IP PHONE, LLC 128   2013-06-21   
857-273 3 Jamaica Plain MA 318J COMCAST IP PHONE, LLC 128   2013-09-08   
857-273 4 Jamaica Plain MA 318J COMCAST IP PHONE, LLC 128   2014-01-18   
857-277 0 Boston MA 318J COMCAST IP PHONE, LLC 128   2006-10-14   
857-277 1 Boston MA 318J COMCAST IP PHONE, LLC 128   2006-10-15   
857-284 7 Boston MA 318J COMCAST IP PHONE, LLC 128   2010-09-21   
857-285 6 Cambridge MA 318J COMCAST IP PHONE, LLC 128   2014-08-15   
857-297 A Newton MA 318J COMCAST IP PHONE, LLC 128      
857-297 2 Newton MA 318J COMCAST IP PHONE, LLC 128   2017-10-09   
857-304 4 Watertown MA 318J COMCAST IP PHONE, LLC 128   2014-09-19   
857-305 3 Boston MA 318J COMCAST IP PHONE, LLC 128   2013-10-31   
857-308 3 Roxbury MA 318J COMCAST IP PHONE, LLC 128   2014-11-17   
857-309 7 Dorchester MA 318J COMCAST IP PHONE, LLC 128   2015-09-29   
857-310 5 Boston MA 318J COMCAST IP PHONE, LLC 128   2015-01-12   
857-315 5 Boston MA 318J COMCAST IP PHONE, LLC 128   2017-12-09   
857-316 2 Brighton MA 318J COMCAST IP PHONE, LLC 128   2015-11-18   
857-317 2 Boston MA 318J COMCAST IP PHONE, LLC 128   2014-05-29   
857-317 3 Boston MA 318J COMCAST IP PHONE, LLC 128   2014-05-29   
857-317 4 Boston MA 318J COMCAST IP PHONE, LLC 128   2014-05-29   
857-317 6 Boston MA 318J COMCAST IP PHONE, LLC 128   2014-04-12   
857-320 2 Cambridge MA 318J COMCAST IP PHONE, LLC 128   2016-05-16   
857-322 A East Boston MA 318J COMCAST IP PHONE, LLC 128      
857-322 1 East Boston MA 318J COMCAST IP PHONE, LLC 128   2017-12-11   
857-338 1 Boston MA 318J COMCAST IP PHONE, LLC 128   2018-12-12   
857-342 7 Hyde Park MA 318J COMCAST IP PHONE, LLC 128   2008-03-07   
857-345 9 Hyde Park MA 318J COMCAST IP PHONE, LLC 128   2006-11-15   
857-346 2 Boston MA 318J COMCAST IP PHONE, LLC 128   2018-07-22   
857-349 6 Winthrop MA 318J COMCAST IP PHONE, LLC 128   2019-05-10   
857-350 3 Boston MA 318J COMCAST IP PHONE, LLC 128   2007-10-01   
857-350 4 Boston MA 318J COMCAST IP PHONE, LLC 128   2007-10-01   
857-363 7 Everett MA 318J COMCAST IP PHONE, LLC 128   2016-02-18   
857-387 A Quincy MA 318J COMCAST IP PHONE, LLC 128      
857-387 2 Quincy MA 318J COMCAST IP PHONE, LLC 128   2021-11-01   
857-404 A Newton MA 318J COMCAST IP PHONE, LLC 128      
857-404 0 Newton MA 318J COMCAST IP PHONE, LLC 128   2007-09-30   
857-449 A Boston MA 318J COMCAST IP PHONE, LLC 128      
857-496 A South Boston MA 318J COMCAST IP PHONE, LLC 128      
857-496 0 South Boston MA 318J COMCAST IP PHONE, LLC 128   2010-09-11   
857-496 1 South Boston MA 318J COMCAST IP PHONE, LLC 128   2005-01-20   
857-496 4 South Boston MA 318J COMCAST IP PHONE, LLC 128   2013-08-24   
857-496 7 South Boston MA 318J COMCAST IP PHONE, LLC 128   2013-07-08   
857-500 6 Cambridge MA 318J COMCAST IP PHONE, LLC 128   2011-11-29   

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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