Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Glen Burnie, MD

<< 1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-981 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-31   
410-981 4 FPATMDFRDS0  9212 VERIZON MARYLAND, INC. 238      
410-981 5 FPATMDFRDS0  9212 VERIZON MARYLAND, INC. 238      
410-981 6 FPATMDFRDS0  9212 VERIZON MARYLAND, INC. 238      
410-981 7 FPATMDFRDS0  9212 VERIZON MARYLAND, INC. 238      
410-981 8 FPATMDFRDS0  9212 VERIZON MARYLAND, INC. 238      
410-981 9 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-08-10   
410-993 A FPATMDFRDS0  9212 VERIZON MARYLAND, INC. 238      
410-999 A BLTMMDSN3MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238      
410-999 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-28   
410-999 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-10-14   
410-999 2 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2010-11-06   
410-999 3 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2010-11-06   
410-999 4 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-999 5 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-999 6 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2003-07-26   
410-999 7 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-999 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-06-22   
410-999 9 BLTMMDSN3MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2003-07-26   
443-270 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-354 A BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-354 0 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-09   
443-354 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-06-16   
443-354 2 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-09   
443-354 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-05-30   
443-354 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-354 5 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-11-05   
443-354 6 BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-354 7 BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-354 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-06-06   
443-354 9   515J IP HORIZON LLC 238   2013-09-06   
443-410 A BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-410 0 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2014-05-25   
443-410 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-05-30   
443-410 2 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-05-30   
443-410 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-03-22   
443-410 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-06-06   
443-410 5 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-410 6 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-410 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2013-09-30   
443-410 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-410 9 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-422 A CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-422 0 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-26   
443-422 1 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-05-10   
443-422 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-04-29   
443-422 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-422 4 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-05   
443-422 5 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-05   
443-422 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-11-25   
443-422 7 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-04-03   
443-422 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-12-03   
443-422 9 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-08-18   
443-517 A   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-517 0   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-05-06   
443-517 2 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-12-20   
443-517 3 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-04-01   
443-517 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-05-06   
443-517 5 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-05   
443-517 6 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-517 7 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-12-02   
443-517 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-21   
443-517 9 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-12-06   
443-557 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 0 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 1 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 2 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-29   
443-557 4 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 5 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 6 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 7 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-557 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-06-16   
443-557 9 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-572 A GLBRMDGLRP0  9212 VERIZON MARYLAND, INC. 238      
443-572 0 GLBRMDGLRP0  9212 VERIZON MARYLAND, INC. 238      
443-572 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-01-15   
443-572 2 BLTMMDCH40Z  5562 METROPCS, INC. 238   2016-10-01   
443-572 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-04   
443-572 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-29   
443-572 5 GLBRMDGLRP0  9212 VERIZON MARYLAND, INC. 238      
443-572 6 BLTMMDCH40Z  5562 METROPCS, INC. 238   2005-07-02   
443-572 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-572 8 GLBRMDGLRP0  9212 VERIZON MARYLAND, INC. 238      
443-572 9 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-08-17   
443-577 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-577 0   829J PAETEC ITEL, LLC 238      
443-577 1   829J PAETEC ITEL, LLC 238      
443-577 2   829J PAETEC ITEL, LLC 238      
443-577 3   829J PAETEC ITEL, LLC 238      
443-577 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-577 5   829J PAETEC ITEL, LLC 238   2005-01-08   
443-577 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-24   
443-577 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-577 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-07-14   
443-577 9   829J PAETEC ITEL, LLC 238      
443-591 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 0 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-06   
443-591 1 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-09-03   
443-591 2 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-01-13   

<< 1 2 3 4 5 6 >>

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.