| ALTICE TECHNICAL SERVICES US CORP.Albany, NY · Active | Albany, NY | Corporation | Mar 29, 2017 | Active |
| ALTICE USA, INC.Albany, NY · Active | Albany, NY | Corporation | Aug 25, 2016 | Active |
| FRIENDSHIP CABLE OF TEXAS, INC.Albany, NY · Active | Albany, NY | Corporation | Jan 18, 2006 | Active |
| CSC TRANSPORT II, INC.Albany, NY · Active | Albany, NY | Corporation | May 1, 2002 | Active |
| CSC TRANSPORT III, INC.Albany, NY · Active | Albany, NY | Corporation | May 1, 2002 | Active |
| CSC T HOLDINGS I, INC.Albany, NY · Active | Albany, NY | Corporation | Aug 3, 2001 | Active |
| CSC T HOLDINGS II, INC.Albany, NY · Active | Albany, NY | Corporation | Aug 3, 2001 | Active |
| CSC T HOLDINGS III, INC.Albany, NY · Active | Albany, NY | Corporation | Aug 3, 2001 | Active |
| CSC T HOLDINGS IV, INC.Albany, NY · Active | Albany, NY | Corporation | Aug 3, 2001 | Active |
| CORAM ROUTE 112 CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Jan 30, 2001 | Active |
| FROWEIN ROAD CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Nov 10, 2000 | Active |
| CABLEVISION OF WAPPINGERS FALLS, INC.Albany, NY · Active | Albany, NY | Corporation | Jun 5, 2000 | Active |
| 1111 STEWART CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Aug 31, 1998 | Active |
| CABLEVISION SYSTEMS CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Aug 31, 1998 | Active |
| CABLEVISION OF BROOKHAVEN, INC.Albany, NY · Active | Albany, NY | Corporation | Feb 11, 1998 | Active |
| CSC ACQUISITION - MA, INC.Albany, NY · Active | Albany, NY | Corporation | Feb 11, 1998 | Active |
| ALTICE REAL ESTATE CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Jun 4, 1996 | Active |
| CSC ACQUISITION - NY, INC.Albany, NY · Active | Albany, NY | Corporation | Jul 11, 1989 | Active |
| CSC ACQUISITION CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Jul 7, 1989 | Active |
| CABLEVISION SYSTEMS ISLIP CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Aug 11, 1987 | Active |
| CABLEVISION SYSTEMS DUTCHESS CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Jun 1, 1987 | Active |
| CABLEVISION SYSTEMS EAST HAMPTON CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | May 18, 1987 | Active |
| CABLEVISION SYSTEMS GREAT NECK CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Mar 7, 1986 | Active |
| CABLEVISION MEDIA SALES CORPORATIONLong Island City, NY · Active | Long Island City, NY | Corporation | Sep 17, 1984 | Active |
| A-R CABLE SERVICES - NY, INC.Albany, NY · Active | Albany, NY | Corporation | Sep 13, 1978 | Active |
| CABLEVISION OF SOUTHERN WESTCHESTER, INC.Albany, NY · Active | Albany, NY | Corporation | Jul 13, 1976 | Active |
| CABLEVISION SYSTEMS WESTCHESTER CORPORATIONAlbany, NY · Active | Albany, NY | Corporation | Sep 15, 1975 | Active |
| SUFFOLK CABLE OF SHELTER ISLAND, INC.Location not reported, NY · Active | Location not reported, NY | Corporation | Oct 4, 1965 | Active |
| SUFFOLK CABLE CORPORATIONLocation not reported, NY · Active | Location not reported, NY | Corporation | Oct 4, 1965 | Active |
| CABLEVISION SYSTEMS HUNTINGTON CORPORATIONLocation not reported, NY · Active | Location not reported, NY | Corporation | Feb 8, 1966 | Active |
| SUFFOLK CABLE OF SMITHTOWN, INC.Location not reported, NY · Active | Location not reported, NY | Corporation | Mar 14, 1966 | Active |
| CABLEVISION SYSTEMS LONG ISLAND CORPORATIONLocation not reported, NY · Active | Location not reported, NY | Corporation | Oct 30, 1973 | Active |
| CABLEVISION SYSTEMS SUFFOLK CORPORATIONLocation not reported, NY · Active | Location not reported, NY | Corporation | Dec 29, 1972 | Active |
| PETRA CABLEVISION CORP.Location not reported, NY · Active | Location not reported, NY | Corporation | Apr 2, 1970 | Active |
| SAMSON CABLEVISION CORP.Location not reported, NY · Active | Location not reported, NY | Corporation | May 17, 1971 | Active |
| CHEDDAR MEDIA, INC.Location not reported, NY · Active | Location not reported, NY | Corporation | Jan 19, 2016 | Active |
| HORNELL TELEVISION SERVICE, INC.Location not reported, NY · Active | Location not reported, NY | Corporation | May 17, 1951 | Active |