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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
443-221 4 Annapolis MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-221 5 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-12   
443-221 6 Annapolis MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2014-01-24   
443-221 7 Annapolis MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2011-07-15   
443-221 8 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-07-15   
443-221 9 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-07-15   
443-222 A Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-222 0 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
443-222 1 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
443-222 2 Worthington MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-03   
443-222 3 Worthington MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-222 4 Worthington MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-222 5 Worthington MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-222 6 Worthington MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-222 7 Worthington MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-222 8 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-222 9 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-223 A Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-224 A Baltimore MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-224 0 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2004-04-08   
443-224 1 Baltimore MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-224 2 Baltimore MD   829J PAETEC ITEL, LLC 238   2006-07-05   
443-224 3 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2004-04-08   
443-224 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-06-25   
443-224 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-06-25   
443-224 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-06-25   
443-224 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-06-25   
443-224 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2004-12-03   
443-224 9 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-08-17   
443-225 A Cambridge MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-225 0 Cambridge MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2020-09-09   
443-225 1 Cambridge MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2024-05-03   
443-225 2 Cambridge MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2010-07-20   
443-225 3 Cambridge MD SLBRMD906MD  145J TERRA NOVA TELECOM INC. 242   2024-05-20   
443-225 4 Cambridge MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2007-12-04   
443-225 5 Cambridge MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2006-07-31   
443-225 6 Cambridge MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2007-09-20   
443-225 7 Cambridge MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2009-03-02   
443-225 8 Cambridge MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2006-08-24   
443-225 9 Cambridge MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2004-03-15   
443-226 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 2 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-226 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-227 A Port Deposit MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-227 0 Port Deposit MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-227 1 Port Deposit MD   829J PAETEC ITEL, LLC 238      
443-227 2 Port Deposit MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-07   
443-227 3 Port Deposit MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-227 4 Port Deposit MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-17   
443-227 5 Port Deposit MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-17   
443-227 6 Port Deposit MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-227 7 Port Deposit MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-227 8 Port Deposit MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-227 9 Port Deposit MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-228 A Chase MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-228 0 Chase MD   829J PAETEC ITEL, LLC 238      
443-228 1 Chase MD   829J PAETEC ITEL, LLC 238      
443-228 3 Chase MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-01-18   
443-228 4 Chase MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-12-12   
443-228 5 Chase MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-26   
443-228 6 Chase MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-228 7 Chase MD   515J IP HORIZON LLC 238   2016-05-31   
443-228 8 Chase MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-228 9 Chase MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-229 A Severna Park MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-229 0 Severna Park MD   829J PAETEC ITEL, LLC 238      
443-229 1 Severna Park MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-11-30   
443-229 2 Severna Park MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-02-12   
443-229 3 Severna Park MD   829J PAETEC ITEL, LLC 238      
443-229 4 Severna Park MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-08-20   
443-229 5 Severna Park MD   876D ONVOY, LLC - MD 238   2025-02-01   
443-229 6 Severna Park MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-25   
443-229 7 Severna Park MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-25   
443-229 8 Severna Park MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2022-10-07   
443-229 9 Severna Park MD   829J PAETEC ITEL, LLC 238      
443-230 A Odenton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-230 1 Odenton MD   829J PAETEC ITEL, LLC 238      
443-230 2 Odenton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-230 3 Odenton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-07-04   
443-230 4 Odenton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-08   
443-230 5 Odenton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-29   
443-230 6 Odenton MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2016-11-17   
443-230 7 Odenton MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-230 8 Odenton MD   515J IP HORIZON LLC 238   2016-01-04   
443-230 9 Odenton MD   515J IP HORIZON LLC 238   2015-03-23   
443-231 A Essex MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-231 0 Essex MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-11   
443-231 1 Essex MD   829J PAETEC ITEL, LLC 238   2005-04-29   
443-231 2 Essex MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-231 3 Essex MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-04-24   
443-231 4 Essex MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-231 5 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   

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Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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