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
443-771 7 Prince Frederick MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2015-09-05   
443-771 8 Prince Frederick MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-771 9 Prince Frederick MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-772 A Essex MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-772 0 Essex MD   829J PAETEC ITEL, LLC 238      
443-772 1 Essex MD   829J PAETEC ITEL, LLC 238      
443-772 2 Essex MD   829J PAETEC ITEL, LLC 238      
443-772 3 Essex MD   829J PAETEC ITEL, LLC 238      
443-772 4 Essex MD   829J PAETEC ITEL, LLC 238      
443-772 5 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-08-23   
443-772 6 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-08-23   
443-772 7 Essex MD   829J PAETEC ITEL, LLC 238      
443-772 8 Essex MD   829J PAETEC ITEL, LLC 238      
443-772 9 Essex MD   829J PAETEC ITEL, LLC 238      
443-773 A Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 0 Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 1 Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 2 Brooklyn Park-Linthicum MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-14   
443-773 3 Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 4 Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 5 Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 6 Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 7 Brooklyn Park-Linthicum MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
443-773 8 Brooklyn Park-Linthicum MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-773 9 Brooklyn Park-Linthicum MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-774 A Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-774 0 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-04-27   
443-774 1 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-04-27   
443-774 2 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 3 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 4 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-07   
443-774 5 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-07-20   
443-774 6 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 7 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 8 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-04-19   
443-774 9 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-01-19   
443-775 A Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-775 0 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-05-06   
443-775 1 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-11-25   
443-775 2 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-12-31   
443-775 3 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-12-31   
443-775 4 Annapolis MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-775 5 Annapolis MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-11-18   
443-775 6 Annapolis MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-05-28   
443-775 7 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-22   
443-775 8 Annapolis MD   515J IP HORIZON LLC 238   2016-05-31   
443-775 9 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2015-11-15   
443-776 A Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-776 0 Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-17   
443-776 1 Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-17   
443-776 2 Elkridge MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-776 3 Elkridge MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-07-31   
443-776 4 Elkridge MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-776 5 Elkridge MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2015-01-28   
443-776 6 Elkridge MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-11   
443-776 7 Elkridge MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-776 8 Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-04   
443-776 9 Elkridge MD   515J IP HORIZON LLC 238   2015-03-23   
443-777 A Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 0 Essex MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-03-14   
443-777 1 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 2 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 3 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 4 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 5 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 6 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 7 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 8 Essex MD ESSXMDEXDS0  9212 VERIZON MARYLAND, INC. 238      
443-777 9 Essex MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-778 A Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 0 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 1 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236   2002-06-25   
443-778 2 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236   2003-02-15   
443-778 3 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 4 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 5 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 6 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 7 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 8 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 9 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236   2003-02-15   
443-779 A Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-779 0 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2016-02-06   
443-779 1 Aberdeen MD WASHDC12KMD  145J TERRA NOVA TELECOM INC. 236   2024-07-16   
443-779 2 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 3 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 4 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 5 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 6 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 7 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 8 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 9 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-12-27   
443-780 A Woodlawn MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-780 0 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-780 1 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-780 2 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-780 3 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-780 4 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-780 5 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-780 6 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-06-21   
443-780 7 Woodlawn MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   

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Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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