Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-578 A Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 0 Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 1 Cockeysville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2014-10-21   
443-578 2 Cockeysville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2015-10-26   
443-578 3 Cockeysville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-02-27   
443-578 4 Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 5 Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 6 Cockeysville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2013-08-15   
443-578 7 Cockeysville MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-578 8 Cockeysville MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2008-09-26   
443-578 9 Cockeysville MD   515J IP HORIZON LLC 238   2015-03-23   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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