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Towson, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-236 A CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
410-249 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-249 0   9212 VERIZON MARYLAND, INC. 238      
410-249 1   9212 VERIZON MARYLAND, INC. 238      
410-249 2   9212 VERIZON MARYLAND, INC. 238      
410-249 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
410-249 4   9212 VERIZON MARYLAND, INC. 238      
410-249 5   9212 VERIZON MARYLAND, INC. 238      
410-249 6   9212 VERIZON MARYLAND, INC. 238      
410-249 7   9212 VERIZON MARYLAND, INC. 238      
410-249 8   9212 VERIZON MARYLAND, INC. 238      
410-249 9   9212 VERIZON MARYLAND, INC. 238      
410-252 A CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-283 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-296 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-307 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-307 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
410-307 1   4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2003-11-08   
410-307 2   9212 VERIZON MARYLAND, INC. 238      
410-307 3   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-12-09   
410-307 4   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-12-09   
410-307 5   9212 VERIZON MARYLAND, INC. 238      
410-307 6   9212 VERIZON MARYLAND, INC. 238      
410-307 7   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-12-09   
410-307 8   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
410-307 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-05-29   
410-308 A CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-321 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-324 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-324 0   876D ONVOY, LLC - MD 238   2024-02-19   
410-324 1   9212 VERIZON MARYLAND, INC. 238      
410-324 2   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
410-324 3   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
410-324 4   9212 VERIZON MARYLAND, INC. 238      
410-324 5   9212 VERIZON MARYLAND, INC. 238      
410-324 6   876D ONVOY, LLC - MD 238   2016-02-29   
410-324 7   876D ONVOY, LLC - MD 238   2016-03-09   
410-324 8   9212 VERIZON MARYLAND, INC. 238      
410-324 9   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-07-17   
410-337 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-339 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-339 0   876D ONVOY, LLC - MD 238   2024-02-19   
410-339 1   876D ONVOY, LLC - MD 238   2016-03-31   
410-339 2   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-339 3   9212 VERIZON MARYLAND, INC. 238      
410-339 4   9212 VERIZON MARYLAND, INC. 238      
410-339 5   9212 VERIZON MARYLAND, INC. 238      
410-339 6   9212 VERIZON MARYLAND, INC. 238      
410-339 7   9212 VERIZON MARYLAND, INC. 238      
410-339 8   876D ONVOY, LLC - MD 238   2024-02-19   
410-339 9   145J TERRA NOVA TELECOM INC. 238   2024-02-14   
410-372 A BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-372 0   9212 VERIZON MARYLAND, INC. 238      
410-372 1   9212 VERIZON MARYLAND, INC. 238      
410-372 2   9212 VERIZON MARYLAND, INC. 238      
410-372 3   318J COMCAST IP PHONE, LLC 238   2015-10-02   
410-372 4   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
410-372 5   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2002-11-30   
410-372 6   829J PAETEC ITEL, LLC 238   2004-11-27   
410-372 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
410-372 8   9212 VERIZON MARYLAND, INC. 238      
410-372 9   9212 VERIZON MARYLAND, INC. 238      
410-373 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-377 A BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-408 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-427 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
410-434 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-453 A CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-453 0   9212 VERIZON MARYLAND, INC. 238      
410-453 1   876D ONVOY, LLC - MD 238   2024-02-19   
410-453 2   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 3   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 4   9212 VERIZON MARYLAND, INC. 238      
410-453 5   9212 VERIZON MARYLAND, INC. 238      
410-453 6   9212 VERIZON MARYLAND, INC. 238      
410-453 7   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 8   876D ONVOY, LLC - MD 238   2024-02-19   
410-453 9   9212 VERIZON MARYLAND, INC. 238      
410-473 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-475 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-492 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-494 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 A TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-512 0   9212 VERIZON MARYLAND, INC. 238      
410-512 1   9212 VERIZON MARYLAND, INC. 238      
410-512 2   9212 VERIZON MARYLAND, INC. 238      
410-512 3   9212 VERIZON MARYLAND, INC. 238      
410-512 4   9212 VERIZON MARYLAND, INC. 238      
410-512 5   9212 VERIZON MARYLAND, INC. 238      
410-512 6   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-07-10   
410-512 7   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-512 8   9212 VERIZON MARYLAND, INC. 238      
410-512 9   876D ONVOY, LLC - MD 238   2024-04-07   
410-560 A CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-560 0   9212 VERIZON MARYLAND, INC. 238      
410-560 1   9212 VERIZON MARYLAND, INC. 238      
410-560 2   9212 VERIZON MARYLAND, INC. 238      
410-560 3   9212 VERIZON MARYLAND, INC. 238      
410-560 4   9212 VERIZON MARYLAND, INC. 238      
410-560 5   9212 VERIZON MARYLAND, INC. 238      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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