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Gaithersburg, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-474 4   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-07-13   
240-474 5   318J COMCAST IP PHONE, LLC 236   2015-09-30   
240-474 6   5562 METROPCS, INC. 236   2015-12-10   
240-474 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-10-16   
240-474 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2016-01-08   
240-474 9   876D ONVOY, LLC - MD 236   2016-03-04   
240-477 A   829J PAETEC ITEL, LLC 236   2025-04-02   
240-477 0   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-06-09   
240-477 1   829J PAETEC ITEL, LLC 236   2005-06-19   
240-477 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-04-07   
240-477 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-04-07   
240-477 4   318J COMCAST IP PHONE, LLC 236   2006-05-29   
240-477 5   318J COMCAST IP PHONE, LLC 236   2006-05-29   
240-477 6   318J COMCAST IP PHONE, LLC 236   2006-08-02   
240-477 7   318J COMCAST IP PHONE, LLC 236   2006-08-02   
240-477 8   318J COMCAST IP PHONE, LLC 236   2006-08-02   
240-477 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-06-09   
240-562 A WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-562 0   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-562 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-07-27   
240-597 A SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-597 0   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-597 1   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-597 2   939H COMMIO, LLC 236   2021-07-12   
240-597 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-06-27   
240-597 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-06-27   
240-597 5   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-06-27   
240-597 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2019-07-13   
240-597 7   568G PEERLESS NETWORK OF MARYLAND, LLC 236   2019-12-28   
240-597 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-06-14   
240-597 9   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-631 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-632 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-654 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-654 0   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2008-05-15   
240-654 1   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2008-05-15   
240-654 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-07-10   
240-654 3   318J COMCAST IP PHONE, LLC 236   2008-03-28   
240-654 4   318J COMCAST IP PHONE, LLC 236   2008-03-28   
240-654 5   281E YMAX COMMUNICATIONS CORP. - MD 236   2009-07-24   
240-654 6   281E YMAX COMMUNICATIONS CORP. - MD 236   2009-07-24   
240-654 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-07-17   
240-654 8   281E YMAX COMMUNICATIONS CORP. - MD 236   2008-08-08   
240-654 9   281E YMAX COMMUNICATIONS CORP. - MD 236   2008-08-08   
240-658 A WASHDC125MD  197D VONAGE AMERICA LLC 236      
240-658 0   197D VONAGE AMERICA LLC 236   2019-01-25   
240-658 1   197D VONAGE AMERICA LLC 236   2019-01-25   
240-658 2   197D VONAGE AMERICA LLC 236   2019-01-25   
240-658 3   197D VONAGE AMERICA LLC 236   2019-01-25   
240-658 4   197D VONAGE AMERICA LLC 236   2019-01-25   
240-658 5   5562 METROPCS, INC. 236   2019-11-29   
240-658 6   197D VONAGE AMERICA LLC 236   2019-01-25   
240-658 7   624H ONVOY SPECTRUM, LLC 236   2021-05-21   
240-658 8   876D ONVOY, LLC - MD 236   2021-02-18   
240-658 9   876D ONVOY, LLC - MD 236   2021-02-18   
240-683 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-686 A GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
240-686 0   9212 VERIZON MARYLAND, INC. 236      
240-686 1   9212 VERIZON MARYLAND, INC. 236      
240-686 2   9212 VERIZON MARYLAND, INC. 236      
240-686 3   9212 VERIZON MARYLAND, INC. 236      
240-686 4   9212 VERIZON MARYLAND, INC. 236      
240-686 5   071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-08-12   
240-686 6   318J COMCAST IP PHONE, LLC 236   2014-06-20   
240-686 7   9212 VERIZON MARYLAND, INC. 236      
240-686 8   281E YMAX COMMUNICATIONS CORP. - MD 236   2007-07-28   
240-686 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2014-09-19   
240-690 A WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
240-690 0   073H TELNYX LLC 236   2017-03-14   
240-690 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2017-01-25   
240-690 2   876D ONVOY, LLC - MD 236   2018-06-14   
240-690 3   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2017-01-09   
240-690 4   318J COMCAST IP PHONE, LLC 236   2017-03-10   
240-690 5   876D ONVOY, LLC - MD 236   2017-12-15   
240-690 6   876D ONVOY, LLC - MD 236   2017-12-15   
240-690 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2019-05-27   
240-690 8   876D ONVOY, LLC - MD 236   2025-10-12   
240-690 9   197D VONAGE AMERICA LLC 236   2018-12-24   
240-702 A WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-702 0   318J COMCAST IP PHONE, LLC 236   2015-07-22   
240-702 1   876D ONVOY, LLC - MD 236   2014-12-01   
240-702 2   876D ONVOY, LLC - MD 236   2014-12-01   
240-702 3   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2015-10-15   
240-702 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2014-11-24   
240-702 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2014-11-24   
240-702 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2014-11-24   
240-702 7   5562 METROPCS, INC. 236   2014-12-29   
240-702 8   5562 METROPCS, INC. 236   2014-12-22   
240-702 9   197D VONAGE AMERICA LLC 236   2018-12-24   
240-720 A   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-720 0   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-720 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-05-31   

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

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