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
857-226 7 Newton MA 321J HD CARRIER LLC 128   2016-02-19   
857-227 2 Somerville MA 321J HD CARRIER LLC 128   2016-04-11   
857-227 6 Somerville MA 321J HD CARRIER LLC 128   2016-04-11   
857-227 8 Somerville MA 321J HD CARRIER LLC 128   2016-04-11   
857-252 1 Quincy MA 321J HD CARRIER LLC 128   2016-09-03   
857-256 6 East Boston MA 321J HD CARRIER LLC 128   2016-04-11   
857-279 5 Newton MA 321J HD CARRIER LLC 128   2016-09-03   
857-279 9 Newton MA 321J HD CARRIER LLC 128   2016-09-03   
857-280 2 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-280 3 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-280 4 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-280 5 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-280 6 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-280 7 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-280 8 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-280 9 Brighton MA 321J HD CARRIER LLC 128   2016-04-29   
857-308 5 Roxbury MA 321J HD CARRIER LLC 128   2015-06-19   
857-309 9 Dorchester MA 321J HD CARRIER LLC 128   2015-06-19   
857-314 5 Milton MA 321J HD CARRIER LLC 128   2016-04-11   
857-314 9 Milton MA 321J HD CARRIER LLC 128   2016-04-11   
857-325 5 Newton MA 321J HD CARRIER LLC 128   2015-06-19   
857-325 8 Newton MA 321J HD CARRIER LLC 128   2016-09-03   
857-325 9 Newton MA 321J HD CARRIER LLC 128   2016-09-03   
857-336 2 Winthrop MA 321J HD CARRIER LLC 128   2016-05-01   
857-336 3 Winthrop MA 321J HD CARRIER LLC 128   2016-05-01   
857-336 4 Winthrop MA 321J HD CARRIER LLC 128   2016-05-01   
857-336 5 Winthrop MA 321J HD CARRIER LLC 128   2016-05-01   
857-336 9 Winthrop MA 321J HD CARRIER LLC 128   2016-09-03   
857-363 4 Everett MA 321J HD CARRIER LLC 128   2016-09-03   
857-385 0 Dorchester MA 321J HD CARRIER LLC 128   2016-09-03   
857-385 1 Dorchester MA 321J HD CARRIER LLC 128   2016-09-03   
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 2 Quincy MA 321J HD CARRIER LLC 128   2026-07-17   
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   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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