EXHIBIT 21 SUBSIDIARIES OF TIME WARNER ENTERTAINMENT COMPANY, L.P. AND THE AOL TIME WARNER GENERAL PARTNERS Time Warner Entertainment Company, L.P. ("TWE") and the AOL Time Warner General Partners maintain numerous subsidiaries. Set forth below are the names of certain subsidiaries, at least 50% owned, directly or indirectly, of TWE and the AOL Time Warner General Partners as of December 31, 2002, which carry on a substantial portion of TWE's and the AOL Time Warner General Partners' lines of business. The names of various consolidated wholly owned subsidiaries, including subsidiaries carrying on the same line of business as the parent (including cable, filmed entertainment, networks and music) domestically and internationally, have been omitted. None of the foregoing omitted subsidiaries, considered either alone or together with the other subsidiaries of its immediate parent, constitutes a significant subsidiary. STATE OR OTHER JURISDICTION OF INCORPORATION NAME OR ORGANIZATION ---- --------------- SUBSIDIARIES OF TIME WARNER ENTERTAINMENT COMPANY, L.P. (AS OF 12/31/2002) Century Venture Corporation................................................... Delaware Comedy Partners, L.P.......................................................... New York (1) Courtroom Television Network LLC.............................................. New York (1) DC Comics..................................................................... New York Erie Telecommunications Inc................................................... Pennsylvania (1) Kansas City Cable Partners.................................................... Colorado (1) Road Runner Holdco LLC........................................................ Delaware The WB Television Network Partners, L.P....................................... California (1) The WB 100+ Station Group Partners, L.P....................................... California (1) Time Warner Entertainment-Advance/Newhouse Partnership........................ New York (1) Texas Cable Partners, L.P................................................. Delaware (1) SUBSIDIARIES OF THE AOL TIME WARNER GENERAL PARTNERS American Television and Communications Corporation (Registrant)............... Delaware Warner Communications Inc..................................................... Delaware Alternative Distribution Alliance......................................... Delaware (1) Atlantic Recording Corporation............................................ Delaware CPP/Belwin, Inc........................................................... Delaware DC Comics................................................................. New York E.C. Publications, Inc.................................................... New York Elektra Entertainment Group Inc........................................... Delaware Ivy Hill Corporation...................................................... Delaware London-Sire Records Inc................................................... Delaware Maverick Recording Company................................................ California (1) New Chappell Inc.......................................................... Delaware Rhino Entertainment Company............................................... Delaware Warner Bros. Music International Inc...................................... Delaware Warner Bros. Publications U.S. Inc........................................ New York Warner Bros. Records Inc.................................................. Delaware Warner/Chappell Music, Inc................................................ Delaware Warner-Elektra-Atlantic Corporation....................................... New York Warner Music Canada Ltd................................................... Canada Warner Music Group Inc.................................................... Delaware Warner Music Newco Limited................................................ United Kingdom Warner-Tamerlane Publishing Corp.......................................... California WB Music Corp............................................................. California WEA International Inc..................................................... Delaware WEA Manufacturing Inc..................................................... Delaware Word Holdings LLC......................................................... Delaware (1) Less than 100% owned ii