Exhibit (21) List of Subsidiaries of AT&T Corp. As of 2/28/97 Jurisdiction of Incorporation - ------------- Alascom,Inc.......................................................Alaska Actuarial Sciences Associates,Inc.................................Delaware American Transtech, Inc...........................................Delaware AT&T Canada Long Distance Services Company........................Canada AT&T Communications, Inc..........................................Delaware AT&T Communications of California, Inc............................California AT&T Communications of Delaware, Inc..............................Delaware AT&T Communications of Hawaii, Inc................................Hawaii AT&T Communications of Illinois, Inc..............................Illinois AT&T Communications of Indiana, Inc...............................Indiana AT&T Communications of Maryland, Inc..............................Maryland AT&T Communications of Michigan, Inc..............................Michigan AT&T Communications of the Midwest, Inc...........................Iowa AT&T Communications of the Mountain States, Inc...................Colorado AT&T Communications of Nevada, Inc................................Nevada AT&T Communications of New England, Inc...........................New York AT&T Communications of New Hampshire, Inc.........................New Hampshire AT&T Communications of New Jersey, Inc............................New Jersey AT&T Communications of New York, Inc..............................New York AT&T Communications of Ohio, Inc..................................Ohio AT&T Communications of the Pacific Northwest, Inc.................Washington AT&T Communications of Pennsylvania, Inc..........................Pennsylvania AT&T Communications of the South Central States,Inc...............Delaware AT&T Communications of the Southern States, Inc...................New York AT&T Communications of the Southwest, Inc.........................Delaware AT&T Communications of Virginia, Inc..............................Virginia AT&T Communications of Washington D.C., Inc.......................New York AT&T Communications of West Virginia, Inc.........................West Virginia AT&T Communications of Wisconsin, Inc.............................Wisconsin AT&T Communications Services International Inc....................Delaware AT&T Communications (UK) LTD......................................United Kingdom AT&T Global Communications Services Inc...........................Delaware AT&T Istel........................................................United Kingdom AT&T Solutions Inc................................................Delaware AT&T of Puerto Rico, Inc..........................................New York AT&T Universal Card Services Corporation..........................Delaware AT&T Wireless Services, Inc.......................................Delaware LIN Broadcasting Corporation......................................Delaware LIN Television Corporation........................................Delaware ROSNET International J.S.C........................................Russia