Local Calling Guide

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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-284 6 Waterloo MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2019-05-02   
443-284 7 Waterloo MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-23   
443-284 8 Waterloo MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-23   
443-284 9 Waterloo MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-23   
443-285 A Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-285 0 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-285 1 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-04-20   
443-285 2 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-09-29   
443-285 3 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-08-19   
443-285 4 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-285 5 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-285 6 Columbia MD   4773 XO MARYLAND, LLC 238      
443-285 7 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-285 8 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-285 9 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-09-29   
443-286 A Baltimore MD CTVLMDBACM3  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-287 A Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
443-288 A Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 0 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 1 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 2 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 3 Ellicott City MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-10-24   
443-288 4 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 5 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 6 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 7 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 8 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-288 9 Ellicott City MD   4773 XO MARYLAND, LLC 238      
443-289 A Westminster MD BLTOMDKHDS0  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-06-30   
443-289 0 Westminster MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-15   
443-289 1 Westminster MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-15   
443-289 2 Westminster MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-06-30   
443-289 3 Westminster MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-06-30   
443-289 4 Westminster MD   6664 SPRINT SPECTRUM L.P. 238   2011-10-10   
443-289 5 Westminster MD   6664 SPRINT SPECTRUM L.P. 238   2011-10-10   
443-289 6 Westminster MD   6664 SPRINT SPECTRUM L.P. 238   2011-10-10   
443-289 7 Westminster MD   6664 SPRINT SPECTRUM L.P. 238   2011-11-23   
443-289 8 Westminster MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2012-11-24   
443-289 9 Westminster MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2014-02-19   
443-290 A Parkville MD LARLMDCC1MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 0 Parkville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2004-04-02   
443-290 1 Parkville MD   082H LOCAL ACCESS LLC - MD 238   2013-09-06   
443-290 2 Parkville MD   7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 3 Parkville MD   876D ONVOY, LLC - MD 238   2016-03-29   
443-290 4 Parkville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2014-01-06   
443-290 5 Parkville MD   876D ONVOY, LLC - MD 238   2012-10-07   
443-290 6 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-290 7 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-08-15   
443-290 8 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-290 9 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-08-15   

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Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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