Local Calling Guide

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Port Deposit, MD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-378 A BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 0 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 1 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 2 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 3 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 4 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 5 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 6 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 7 BLTMMDCHX7X  073H TELNYX LLC 238   2020-10-18   
410-378 8 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
410-378 9 BNBRMDBRRS0  9212 VERIZON MARYLAND, INC. 238      
443-227 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-227 0 BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-227 1   829J PAETEC ITEL, LLC 238      
443-227 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-07   
443-227 3 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-227 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-17   
443-227 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-17   
443-227 6 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-227 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-227 8 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-227 9 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-731 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-731 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-03   
443-731 1 BLTMMDCH47Z  420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238   2008-08-05   
443-731 2 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
443-731 3 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-11-19   
443-731 4 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2017-08-03   
443-731 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2018-06-16   
443-731 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-731 7 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-731 8 BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-731 9 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-747 A BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-747 0 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-747 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-18   
443-747 2   829J PAETEC ITEL, LLC 238   2004-02-05   
443-747 3 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-747 4 BLTMMDCH3MD  228C IDT AMERICA, CORP. - MD 238   2012-01-08   
443-747 5 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2006-05-04   
443-747 6 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-747 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-747 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-747 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
667-396 A BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-396 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-02-25   
667-396 1 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-05   
667-396 2 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-05   
667-396 3 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-396 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-01-01   
667-396 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-23   
667-396 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-22   
667-396 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-23   
667-396 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-23   
667-396 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-23   
667-398 A BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
667-398 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-04-23   
667-398 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-04-24   
667-398 2   318J COMCAST IP PHONE, LLC 238   2025-08-01   
667-398 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2024-05-18   
667-398 9 BLTMMDCHX7X  073H TELNYX LLC 238   2022-12-26   
667-837 A BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
667-837 0   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-12-07   
667-837 1   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-12-07   
667-837 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
667-837 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
667-837 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-12-07   
667-837 5 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
667-837 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
667-837 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
667-837 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
667-837 9 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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