EX-21 18 e84804exv21.txt LIST OF SUBSIDIARIES Exhibit 21 - Subsidiary List List of Subsidiaries of AT&T Corp. As of 3/28/03 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, LLC.....................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, LLC.....................Delaware 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 New Jersey Holdings, LLC............................Delaware 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, LLC.................Delaware AT&T Communications of the South Central States, LLC.....Delaware AT&T Communications of the Southern States, LLC..........Delaware AT&T Communications of the Southwest, Inc................Delaware AT&T Communications of Virginia, LLC.....................Virginia AT&T Communications of Washington D.C., LLC..............Delaware AT&T Communications of West Virginia, Inc................West Virginia AT&T Communications Holdings of Wisconsin, LLC...........Delaware AT&T Communications Services International Inc...........Delaware AT&T Global Communications Services Inc..................Delaware AT&T Solutions Inc.......................................Delaware AT&T Global Network Services LLC.........................Delaware AT&T Global Network Services Group LLC...................Delaware AT&T of Puerto Rico, Inc.................................New York AT&T of the Virgin Islands, Inc..........................Delaware Teleport Communications Group Inc........................Delaware