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 6 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-09-11   
857-284 0 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2008-05-19   
857-284 1 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2008-05-19   
857-288 A Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-288 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2009-10-25   
857-288 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2009-10-25   
857-288 4 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2009-10-25   
857-288 6 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2006-11-10   
857-288 7 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2006-11-10   
857-293 5 East Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2012-05-10   
857-300 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-11-16   
857-313 7 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2014-02-11   
857-316 3 Brighton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2015-11-10   
857-317 5 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2015-01-14   
857-318 A Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-318 0 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-12-10   
857-321 5 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-06-09   
857-321 6 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-06-09   
857-338 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2018-03-27   
857-338 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2018-03-27   
857-350 1 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-09-07   
857-350 8 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-12-07   
857-350 9 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-12-07   
857-352 5 Brookline MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2016-06-16   
857-353 A Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-353 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2020-02-27   
857-353 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2020-02-27   
857-353 4 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2020-02-27   
857-366 8 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-06-08   
857-366 9 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-06-08   
857-378 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2017-03-22   
857-385 3 Dorchester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2016-07-24   
857-394 A Belmont MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-394 3 Belmont MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2022-04-04   
857-400 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-11-16   
857-400 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-04-22   
857-409 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2016-12-16   
857-409 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2017-08-07   
857-413 4 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2006-01-07   
857-413 5 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2006-01-07   
857-415 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2013-11-22   
857-415 4 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2014-01-15   
857-415 5 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2014-05-20   
857-416 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2023-03-09   
857-443 2 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2017-07-14   
857-472 5 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2005-04-24   
857-472 6 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2005-04-24   
857-472 7 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2005-04-24   
857-500 4 Cambridge MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-11-29   
857-504 3 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2015-11-10   

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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