Local Calling Guide

Area code/prefix search

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Rock Hall, MD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-639 A RKHLMDRHRS0  9212 VERIZON MARYLAND, INC. 242      
410-639 0   2593 CORE COMMUNICATIONS, INC. - MD 242   2004-04-03   
410-639 2   9212 VERIZON MARYLAND, INC. 242      
410-639 3   876D ONVOY, LLC - MD 242   2017-04-14   
410-639 4   228C IDT AMERICA CORP - MD 242   2006-05-21   
410-639 5   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 242   2017-09-18   
410-639 7   9212 VERIZON MARYLAND, INC. 242      
410-639 8   073H TELNYX LLC 242   2017-09-13   
410-639 9   9212 VERIZON MARYLAND, INC. 242      
667-242 A   2593 CORE COMMUNICATIONS, INC. - MD 242   2018-08-03   
667-242 0   2593 CORE COMMUNICATIONS, INC. - MD 242   2018-08-03   
667-242 1   2593 CORE COMMUNICATIONS, INC. - MD 242   2018-08-03   
667-242 2   2593 CORE COMMUNICATIONS, INC. - MD 242   2018-08-03   
667-242 3   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
667-242 4   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
667-242 5   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
667-242 6   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
667-242 7   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
667-242 8   876D ONVOY, LLC - MD 242   2019-02-26   
667-242 9   876D ONVOY, LLC - MD 242   2019-02-26   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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