List of Subsidiaries of AT&T Corp. As of 3/23/00 Jurisdiction of Incorporation ACC Corp.................................................Delaware Alascom, Inc.............................................Alaska 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 Global Communications Services Inc..................Delaware AT&T Istel...............................................United Kingdom AT&T Solutions Inc.......................................Delaware AT&T Global Network Services Inc.........................Delaware AT&T of Puerto Rico, Inc.................................New York AT&T Wireless Services, Inc..............................Delaware LIN Broadcasting Corporation.............................Delaware Teleport Communications Group Inc........................Delaware Tele-Communications, Inc.................................Delaware