Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: CMBRMABEQMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
857-385 4 Dorchester MA 321J HD CARRIER LLC 128   2016-09-03   
857-385 5 Dorchester MA 321J HD CARRIER LLC 128   2016-09-03   
857-385 7 Dorchester MA 321J HD CARRIER LLC 128   2016-09-03   
857-402 A East Boston MA 321J HD CARRIER LLC 128      
857-402 0 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-402 1 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-402 3 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-402 4 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-402 5 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-402 7 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-402 9 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-403 5 Quincy MA 321J HD CARRIER LLC 128   2016-09-03   
857-407 2 Roxbury MA 321J HD CARRIER LLC 128   2016-02-19   
857-414 A Brighton MA 321J HD CARRIER LLC 128      
857-414 0 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-414 2 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-414 3 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-414 4 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-414 5 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-414 6 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-414 8 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-414 9 Brighton MA 321J HD CARRIER LLC 128   2016-09-03   
857-477 0 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-12   
857-477 1 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-12   
857-477 2 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-12   
857-477 3 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-12   
857-477 4 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-12   
857-477 5 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-16   
857-477 6 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-12   
857-477 9 Jamaica Plain MA 321J HD CARRIER LLC 128   2016-04-12   
857-523 4 Somerville MA 321J HD CARRIER LLC 128   2016-09-03   
857-577 0 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-577 1 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-577 2 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-577 3 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-577 4 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-577 5 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-577 6 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-577 9 Charlestown MA 321J HD CARRIER LLC 128   2016-04-12   
857-587 A Dorchester MA 321J HD CARRIER LLC 128      
857-587 2 Dorchester MA 321J HD CARRIER LLC 128   2016-05-12   
857-587 3 Dorchester MA 321J HD CARRIER LLC 128   2016-05-12   
857-587 4 Dorchester MA 321J HD CARRIER LLC 128   2016-05-12   
857-587 5 Dorchester MA 321J HD CARRIER LLC 128   2016-05-12   
857-587 6 Dorchester MA 321J HD CARRIER LLC 128   2016-05-12   
857-587 7 Dorchester MA 321J HD CARRIER LLC 128   2016-03-21   
857-587 8 Dorchester MA 321J HD CARRIER LLC 128   2016-05-12   
857-587 9 Dorchester MA 321J HD CARRIER LLC 128   2016-05-12   
857-799 A Cambridge MA 321J HD CARRIER LLC 128      
857-799 9 Cambridge MA 321J HD CARRIER LLC 128   2018-12-29   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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