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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
443-337 8 Sparrows Point MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-337 9 Sparrows Point MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-31   
443-338 A Sparks-Glencoe MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-338 0 Sparks-Glencoe MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-06-07   
443-338 1 Sparks-Glencoe MD   515J IP HORIZON LLC 238   2015-03-21   
443-338 2 Sparks-Glencoe MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238      
443-338 3 Sparks-Glencoe MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-06   
443-338 4 Sparks-Glencoe MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-08-06   
443-338 5 Sparks-Glencoe MD   515J IP HORIZON LLC 238   2016-05-31   
443-338 6 Sparks-Glencoe MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-02-27   
443-338 7 Sparks-Glencoe MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-338 8 Sparks-Glencoe MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-26   
443-338 9 Sparks-Glencoe MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-26   
443-339 A Sherwood Forest MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-339 0 Sherwood Forest MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-339 1 Sherwood Forest MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238      
443-339 2 Sherwood Forest MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-11-14   
443-339 3 Sherwood Forest MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-339 4 Sherwood Forest MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-339 5 Sherwood Forest MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-18   
443-339 6 Sherwood Forest MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-18   
443-339 7 Sherwood Forest MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-339 8 Sherwood Forest MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-339 9 Sherwood Forest MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-340 A Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-341 A Catonsville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-341 0 Catonsville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-341 1 Catonsville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-341 2 Catonsville MD BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2004-02-14   
443-341 3 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-341 4 Catonsville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-341 5 Catonsville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-12-27   
443-341 6 Catonsville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-341 7 Catonsville MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-341 8 Catonsville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2004-03-27   
443-341 9 Catonsville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-342 A Solomons MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-342 1 Solomons MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238      
443-342 2 Solomons MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-04   
443-342 3 Solomons MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-13   
443-342 4 Solomons MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-01-04   
443-342 5 Solomons MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-342 6 Solomons MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-06   
443-342 7 Solomons MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-342 8 Solomons MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-06-16   
443-342 9 Solomons MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-04   
443-343 A Millersville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-343 0 Millersville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-04-07   
443-343 1 Millersville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2003-07-12   
443-343 2 Millersville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   

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

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