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Towson, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-339 9 BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-14   
410-372 A BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-372 0 BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-372 1 BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-372 2 BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-372 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-10-02   
410-372 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
410-372 5 BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2002-11-30   
410-372 6   829J PAETEC ITEL, LLC 238   2004-11-27   
410-372 7 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
410-372 8 BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-372 9 BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-373 A HNVAMDAE3MD  6630 SPOK, INC. 238      
410-377 A BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-408 A HNVAMDAE3MD  6630 SPOK, INC. 238      
410-427 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
410-434 A HNVAMDAE3MD  6630 SPOK, INC. 238      
410-453 A CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-453 0 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-453 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-19   
410-453 2 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 3 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 4 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-453 5 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-453 6 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-453 7 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-19   
410-453 9 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-473 A HNVAMDAE3MD  6630 SPOK, INC. 238      
410-475 A HNVAMDAE3MD  6630 SPOK, INC. 238      
410-492 A HNVAMDAE3MD  6630 SPOK, INC. 238      
410-494 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 0 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 1 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 2 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 3 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 4 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 5 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 6 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-07-10   
410-512 7 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-512 8 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-04-07   
410-560 A CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-560 0 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-560 1 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-560 2 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-560 3 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-560 4 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-560 5 CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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