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Exhibit 21
ARRAY DIGITAL INFRASTRUCTURE, INC.
SUBSIDIARY COMPANIES
December 31, 2025
 
SUBSIDIARY COMPANIES STATE OF ORGANIZATION
   
ADI FINANCIAL, LLC ILLINOIS
ADI HOLDING COMPANY, LLCDELAWARE
ADI INVESTMENT COMPANY OF FRESNO CALIFORNIA
ADI INVESTMENT COMPANY OF LOS ANGELES, INC. INDIANA
ADI INVESTMENT COMPANY OF OKLAHOMA CITY, LLC OKLAHOMA
ADI INVESTMENT COMPANY, LLC DELAWARE
ADI INVESTMENT CORPORATION DELAWARE
ADI LEASING COMPANY, LLCDELAWARE
ADI MANAGEMENT SERVICES, LLCDELAWARE
ADI OPERATING COMPANY, LLC DELAWARE
ADI WIRELESS INVESTMENT, INC. DELAWARE
ADIOC NEBRASKA/KANSAS, INC. DELAWARE
ADIOC NEBRASKA/KANSAS, LLC DELAWARE
ADIOC OF BANGOR, INC. MAINE
ADIOC OF CEDAR RAPIDS, INC. DELAWARE
ADIOC OF CENTRAL ILLINOIS, LLC ILLINOIS
ADIOC OF CUMBERLAND, LLC DELAWARE
ADIOC OF DUBUQUE, INC. IOWA
ADIOC OF GREATER IOWA, LLC DELAWARE
ADIOC OF GREATER MISSOURI, LLC DELAWARE
ADIOC OF GREATER NORTH CAROLINA, LLC DELAWARE
ADIOC OF GREATER OKLAHOMA, LLC OKLAHOMA
ADIOC OF JACKSONVILLE, LLC DELAWARE
ADIOC OF KNOXVILLE, INC. TENNESSEE
ADIOC OF LACROSSE, LLC DELAWARE
ADIOC OF MEDFORD, INC. OREGON
ADIOC OF OREGON RSA # 5, INC. DELAWARE
ADIOC OF PENNSYLVANIA RSA NO. 10-B2, LLC DELAWARE
ADIOC OF RICHLAND, INC. WASHINGTON
ADIOC OF SOUTH CAROLINA RSA # 4, INC. SOUTH CAROLINA
ADIOC OF VIRGINIA RSA # 3, INC. VIRGINIA
ADIOC OF WASHINGTON-4, INC. DELAWARE
ADIOC OF YAKIMA, INC. WASHINGTON
ADVANTAGE SPECTRUM, L.P.DELAWARE
BANGOR CELLULAR TELEPHONE, L.P. DELAWARE
CALIFORNIA RURAL SERVICE AREA #1, INC. CALIFORNIA
CEDAR RAPIDS CELLULAR TELEPHONE, L.P. DELAWARE
CELLVEST, INC. DELAWARE
CENTRAL CELLULAR TELEPHONES, LTD. ILLINOIS
CHAMPLAIN CELLULAR, INC. NEW YORK
COMMUNITY CELLULAR TELEPHONE COMPANY TEXAS
CROWN POINT CELLULAR, INC. NEW YORK
DUBUQUE CELLULAR TELEPHONE, L.P. DELAWARE
HARDY CELLULAR TELEPHONE COMPANY DELAWARE
IOWA RSA # 3, INC. DELAWARE
IOWA RSA # 9, INC. DELAWARE



IOWA RSA # 12, INC. DELAWARE
JACKSONVILLE CELLULAR PARTNERSHIP NORTH CAROLINA
JACKSONVILLE CELLULAR TELEPHONE COMPANY NORTH CAROLINA
KANSAS #15 LIMITED PARTNERSHIP DELAWARE
KENOSHA CELLULAR TELEPHONE, L.P. DELAWARE
KING STREET WIRELESS, LLCDELAWARE
KING STREET WIRELESS, L.P.DELAWARE
MADISON CELLULAR TELEPHONE COMPANY WISCONSIN
MAINE RSA # 1, INC. MAINE
MAINE RSA # 4, INC. MAINE
MCDANIEL CELLULAR TELEPHONE COMPANY DELAWARE
MINNESOTA INVCO OF RSA # 7, INC. DELAWARE
NEWPORT CELLULAR, INC. NEW YORK
NH #1 RURAL CELLULAR, INC. NEW HAMPSHIRE
OREGON RSA #2, INC. OREGON
PCS WISCONSIN, LLC WISCONSIN
RACINE CELLULAR TELEPHONE COMPANY WISCONSIN
SUNSHINE SPECTRUM, LLCDELAWARE
TEXAS INVCO OF RSA # 6, INC. DELAWARE
TOWNSHIP CELLULAR TELEPHONE, INC. DELAWARE
VERMONT RSA NO. 2-B2, INC. DELAWARE
WASHINGTON RSA # 5, INC. WASHINGTON
WESTELCOM CELLULAR, INC. NEW YORK
WESTERN SUB-RSA LIMITED PARTNERSHIP DELAWARE
YAKIMA MSA LIMITED PARTNERSHIP DELAWARE