EXHIBIT 21 CAI WIRELESS SYSTEMS, INC. LIST OF SUBSIDIARIES OF THE REGISTRANT SUBSIDIARIES OF THE REGISTRANT SUBSIDIARY NAME UNDER WHICH SUBSIDIARY STATE OF CONDUCTS BUSINESS INCORPORATION Greater Albany Wireless Systems, Inc. Capital Choice Television New York Rochester Choice Television, Inc. Delaware Hampton Roads Wireless, Inc. Delaware Eastern New England TV, Inc. Delaware Connecticut Choice Television, Inc. Connecticut Commonwealth Choice Television, Inc. Delaware Atlantic Microsystems, Inc. Delaware Housatonic Wireless, Inc. New York New York Choice Television, Inc. Wireless Cable of New York New York Niskayuna Associates, Inc. Delaware Onteo Associates, Inc. New York Washington Choice Television, Inc. Atlantic Wireless Delaware CAI CT Holdings Corp. Delaware CAI Developments, Inc. Delaware CAI/AMI Spectrum Management, Inc. Delaware Philadelphia Choice Television, Inc. Popvision Delaware ACS License, Inc. Pennsylvania Onondaga Wireless, Inc. New York Chenango Associates, Inc. New York AMI Boston, Inc. Delaware CAI Data Systems, Inc. Delaware CAI Wireless Internet, Inc. Delaware Springfield License, Inc. Delaware Springfield Choice Television, Inc. Delaware _______________