Exhibit 21

SUBSIDIARIES OF AMERICAN TOWER CORPORATION

Subsidiary	Jurisdiction of Incorporation or Organization
10 Presidential Way Associates, LLC		Delaware
Adquisiciones y Proyectos Inalámbricos, S. de R.L. de C.V.		Mexico
American Tower Asset Sub, LLC		Delaware
American Tower Asset Sub II, LLC		Delaware
American Tower Corporation de Mexico, S. de R.L. de C.V.		Mexico
American Tower Delaware Corporation		Delaware
American Tower Depositor Sub, LLC		Delaware
American Tower do Brasil - Cessão de Infra-Estruturas Ltda.		Brazil
American Tower Guarantor Sub, LLC		Delaware
American Tower Holding Sub, LLC		Delaware
American Tower International, Inc.		Delaware
American Tower Management, LLC		Delaware
American Tower Mauritius		Republic of Mauritius
American Tower LLC		Delaware
American Tower, L.P.		Delaware
American Tower UK Limited		United Kingdom
American Towers LLC		Delaware
ATC Asia Holding Company, LLC		Delaware
ATC Chile Holding LLC		Delaware
ATC FL Towers, Inc.		Florida
ATC GP, Inc.		Delaware
ATC India Tower Corporation Private Limited		India
ATC International Holding Corp.		Delaware

ATC Latin America S.A. de C.V., SOFOM, E.N.R.	Mexico
ATC LP, Inc.	Delaware
ATC MexHold LLC	Delaware
ATC Mexico Holding LLC	Delaware
ATC Midwest, LLC	Delaware
ATC On Air + LLC	Delaware
ATC Outdoor DAS, LLC	Delaware
ATC Presidential Way, Inc.	Delaware
ATC South America Holding LLC	Delaware
ATC South LLC	Delaware
ATC Tower Company of India Private Limited	India
ATC Tower Services, Inc.	New Mexico
ATS-Needham LLC (1)	Massachusetts
ATS/PCS, LLC	Delaware
California Tower, Inc.	Delaware
CNC2 Associates, LLC	Delaware
Columbia Steel, Inc.	South Carolina
Haysville Towers, L.L.C. (2)	Kansas
ATC Asia Pacific Pte. Ltd.	Singapore
Iron & Steel Co., Inc.	Delaware
MATC Digital, S. de R.L. de C.V.	Mexico
MATC Servicios, S. de R.L. de C.V.	Mexico
McCoy Developers Private Limited	India
MHB Tower Rentals of America, LLC	Mississippi
New Loma Communications, Inc.	California
Red Spires Asset Sub, LLC	Delaware
Semaan Engineering Solutions, LLC	Delaware
Shreveport Tower Company	Louisiana

SpectraSite Communications, LLC	Delaware
SpectraSite, LLC	Delaware
TeleCom Towers, L.L.C.	Delaware
Towers of America, L.L.L.P.	Delaware
Transcend Infrastructure Holdings Pte. Ltd.	Singapore
Transcend Infrastructure Private Limited	India
UniSite/Omnipoint NE Tower Venture, LLC (3)	Delaware
UniSite/Omnipoint FL Tower Venture, LLC (3)	Delaware
UniSite/Omnipoint PA Tower Venture, LLC (3)	Delaware
UniSite, LLC	Delaware
ATC Telecom Tower Corporation Private Limited	India
ATC Backhaul LLC	Delaware
ATC Sitios del Peru S.R.L.	Peru
ATC Peru Holding LLC	Delaware
ATC Colombia Holding LLC	Delaware
ATC Sitios de Chile S.A.	Chile
ATC Sitios de Colombia S.A.S.	Colombia
Tower Marketco Ghana Limited	Republic of Ghana
American Tower International Holding I LLC	Delaware
American Tower International Holding II LLC	Delaware
AT Netherlands C.V.	Netherlands
AT Netherlands Coöperatief U.A.	Netherlands
Wireless Resource Group, LLC	Oklahoma
WRG Holdings, LLC	Oklahoma
Central States Tower Parent, LLC	Delaware
Central States Tower Holdings, LLC	Delaware
ATC Utah, Inc.	Delaware
ATC New Mexico LLC	Missouri

ATC South Africa Investment Holdings (Proprietary) Limited	South Africa
Ghana Tower Interco B.V. (4)	Netherlands
ATC Tower (Ghana) Limited	Republic of Ghana
AT Sher Netherlands Coöperatief U.A.	Netherlands
ATC Indoor DAS LLC	Delaware
ATC Antennas LLC	Delaware
ATC Managed Sites LLC	Delaware
ATC South Africa Wireless Infrastructure (Pty) Ltd	South Africa
ATC IP LLC	Delaware
ATC Marketing (Uganda) Limited	Uganda
ATC India Infrastructure Private Limited	India
ATC Payroll LLC	Delaware
ATC Brazil Holding LLC	Delaware
ATC Brazil I LLC	Delaware
ATC Brazil II LLC	Delaware
ATC Colombia Holding I LLC	Delaware
ATC Colombia I LLC	Delaware
AT Sao Paulo C.V.	Netherlands
AT South America C.V.	Netherlands
ATC Brazil Coöperatief U.A.	Netherlands
ATC Colombia B.V. (5)	Netherlands
B1 Ulysses Site Management LLC	Delaware
Ulysses Asset Sub I, LLC	Delaware
Ulysses Asset Sub II, LLC	Delaware
T7 Ulysses Site Management LLC	Delaware
T8 Ulysses Site Management LLC	Delaware
Ulysses Ground Lease Funding, LLC	Delaware
Ulysses Ground Lease Holdco, LLC	Delaware

Verus Management One, LLC	Delaware
VM Ulysses Site Management LLC	Delaware
ATC Sitios Infraco S.A.S	Colombia
Uganda Tower Interco B.V. (6)	Netherlands
ATC Uganda Limited (7)	Uganda
Lap do Brasil Empreendimentos Imobiliários Ltda.	Brazil

(1) 45.24% owned by American Tower, L.P. and 34.76% owned by American Towers LLC.

(2) 66.667% owned by TeleCom Towers, L.L.C.

(3) 95% owned by UniSite, LLC.

(4) 51% owned by AT Sher Netherlands Coöperatief U.A.

(5) 60% owned by AT South America C.V.

(6) 51% owned by AT Sher Netherlands Coöperatief U.A.

(7) 96% owned by Uganda Tower Interco B.V.