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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
443-333 1 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-19   
443-333 2 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-13   
443-333 3 Annapolis MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-04-15   
443-333 4 Annapolis MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-11-09   
443-333 5 Annapolis MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-07-18   
443-333 6 Annapolis MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-23   
443-333 7 Annapolis MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-23   
443-333 8 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-333 9 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-28   
443-334 A Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-334 0 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-334 1 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-334 2 Pikesville MD PIVLMDPKDS1  9212 VERIZON MARYLAND, INC. 238   2003-10-30   
443-334 3 Pikesville MD PIVLMDPKDS1  9212 VERIZON MARYLAND, INC. 238   2003-10-30   
443-334 4 Pikesville MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238   2005-03-10   
443-334 5 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-10-30   
443-334 6 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-08   
443-334 7 Pikesville MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2016-10-24   
443-334 8 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2007-12-04   
443-334 9 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-335 A Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-335 0 Brooklyn Park-Linthicum MD   876D ONVOY, LLC - MD 238   2026-08-15   
443-335 1 Brooklyn Park-Linthicum MD   876D ONVOY, LLC - MD 238   2026-10-03   
443-335 2 Brooklyn Park-Linthicum MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2018-11-18   
443-335 4 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-10-13   
443-335 5 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2020-01-24   
443-335 6 Brooklyn Park-Linthicum MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-10-26   
443-335 7 Brooklyn Park-Linthicum MD   824J OPENTACT INC. 238   2026-10-09   
443-335 8 Brooklyn Park-Linthicum MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-335 9 Brooklyn Park-Linthicum MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-336 A Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 0 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 1 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 2 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 3 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 4 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 5 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 6 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 7 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 8 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-336 9 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-337 A Sparrows Point MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-337 0 Sparrows Point MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2021-04-16   
443-337 1 Sparrows Point MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-10-13   
443-337 2 Sparrows Point MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-337 3 Sparrows Point MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-10-01   
443-337 4 Sparrows Point MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2018-01-06   
443-337 5 Sparrows Point MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-337 6 Sparrows Point MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-337 7 Sparrows Point MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   

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

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