Exhibit 21

SUBSIDIARIES OF AMERICAN TOWER CORPORATION

Subsidiary	Jurisdiction of Incorporation  or Organization
10 Presidential Way Associates, LLC		Delaware
ACC Tower Sub, LLC		Delaware
Adquisiciones y Proyectos Inalámbricos, S. de R. L. de C.V.		Mexico
Alternative Networking, Inc.		Florida
American Tower Asset Sub II, LLC		Delaware
American Tower Asset Sub, LLC		Delaware
American Tower Corporation de Mexico, S. de R.L. de C.V.		Mexico
American Tower Corporation		Delaware
American Tower Delaware Corporation		Delaware
American Tower Depositor Sub, LLC		Delaware
American Tower do Brasil - Cessão de Infraestruturas Ltda.		Brazil
American Tower Guarantor Sub, LLC		Delaware
American Tower Holding Sub, LLC		Delaware
American Tower International Holding I LLC		Delaware
American Tower International Holding II LLC		Delaware
American Tower International, Inc.		Delaware
American Tower Investments LLC		California
American Tower LLC		Delaware
American Tower Management, LLC		Delaware
American Tower Mauritius		Republic of Mauritius
American Tower UK Limited		United Kingdom
American Tower, L.P.		Delaware
American Towers LLC		Delaware
AT Netherlands C.V.		Netherlands
AT Netherlands Coöperatief U.A		Netherlands
AT Sao Paulo C.V.		Netherlands
AT Sher Netherlands Coöperatief U.A.		Netherlands
AT South America C.V.		Netherlands
ATC Antennas LLC		Delaware
ATC Asia Holding Company, LLC		Delaware
ATC Asia Pacific Pte. Ltd.		Singapore
ATC Backhaul LLC		Delaware
ATC Brazil Coöperatief U.A.		Netherlands
ATC Brazil Holding LLC		Delaware
ATC Brazil I LLC		Delaware
ATC Brazil II LLC		Delaware
ATC Chile Holding LLC		Delaware
ATC Colombia B.V. (1)		Netherlands
ATC Colombia Holding I LLC		Delaware
ATC Colombia Holding LLC		Delaware
ATC Colombia I LLC		Delaware

ATC FL Towers, Inc.	Florida
ATC Germany Holdings GmbH	Germany
ATC Germany Operating 1 GmbH	Germany
ATC Germany Operating 2 GmbH	Germany
ATC Germany Services GmbH	Germany
ATC GP, Inc.	Delaware
ATC India Infrastructure Private Limited	India
ATC India Tower Corporation Private Limited	India
ATC Indoor DAS LLC	Delaware
ATC International Holding Corp.	Delaware
ATC IP LLC	Delaware
ATC Iris I LLC	Delaware
ATC Latin America S.A. de C.V., SOFOM, E.N.R	Mexico
ATC LP, Inc.	Delaware
ATC Managed Sites LLC	Delaware
ATC Marketing (Uganda) Limited	Uganda
ATC MexHold LLC	Delaware
ATC Mexico Holding LLC	Delaware
ATC Midwest, LLC	Delaware
ATC New Mexico LLC	Missouri
ATC On Air + LLC	Delaware
ATC Operations LLC	Delaware
ATC Outdoor DAS, LLC	Delaware
ATC Peru Holding LLC	Delaware
ATC Presidential Way, Inc.	Delaware
ATC Sitios de Chile S.A.	Chile
ATC Sitios de Colombia S.A.S.	Colombia
ATC Sitios del Peru S.R.L.	Peru
ATC Sitios Infraco S.A.S. (2)	Colombia
ATC South Africa Investment Holdings (Proprietary) Limited (3)	South Africa
ATC South Africa Wireless Infrastructure (Pty) Ltd (2)	South Africa
ATC South America Holding LLC	Delaware
ATC South LLC	Delaware
ATC Telecom Tower Corporation Private Limited	India
ATC Tower (Ghana) Limited (2)	Republic of Ghana
ATC Tower Company of India Private Limited	India
ATC Tower Services LLC	Delaware
ATC TRS I LLC	Delaware
ATC TRS II LLC	Delaware
ATC Trust	Maryland
ATC Uganda Limited (2)	Uganda
ATC Utah, Inc.	Delaware
ATS/PCS, LLC	Delaware
ATS-Needham, LLC (4)	Massachusetts
B1 Ulysses Site Management	Delaware
California Tower, Inc.	Delaware
Cell Site NewCo I, LLC	Delaware

Cell Site NewCo II, LLC	Delaware
Cell Tower Lease Acquisition LLC	Delaware
Centennial Towers CR, S.R.L.	Costa Rica
Central States Tower Holdings, LLC	Delaware
Central States Tower Parent, LLC	Delaware
CNC2 Associates, LLC	Delaware
Columbia Steel, Inc.	South Carolina
DCS NewCo, LLC	Delaware
DCS Tower Sub, LLC	Delaware
Germany Tower Interco B.V.	Netherlands
Ghana Tower InterCo B.V. (5)	Netherlands
Global Tower Assets II, LLC	Delaware
Global Tower Assets III, LLC	Delaware
Global Tower Assets IV, LLC	Delaware
Global Tower Assets V, LLC	Delaware
Global Tower Assets, LLC	Delaware
Global Tower Brazil, LLC	Delaware
Global Tower DAS, LLC	Delaware
Global Tower Holdings, LLC	Delaware
Global Tower Management, LLC	Delaware
Global Tower Partners do Brasil Participacoes Ltda.	Brazil
Global Tower Properties, LLC	Delaware
Global Tower Services, LLC	Delaware
Global Tower Sites I, LLC	Delaware
Global Tower, LLC	Delaware
GLP Cell Site A, LLC	Delaware
GLP Cell Site I, LLC	Delaware
GLP Cell Site II, LLC	Delaware
GLP Cell Site III, LLC	Delaware
GLP Cell Site IV, LLC	Delaware
GLP Guarantor Sub LLC	Delaware
GLP LLC	Delaware
Gondola Communications Holdings LLC	Delaware
Gondola Holding LLC	Delaware
Gondola Tower Holdings LLC	Delaware
GTP Acquisition Partners I, LLC	Delaware
GTP Acquisition Partners II, LLC	Delaware
GTP Acquisition Partners III, LLC	Delaware
GTP ANI Holdings, LLC	Delaware
GTP Cellular Sites, LLC	Delaware
GTP Costa Rica Finance, LLC	Delaware
GTP Costa Rica HoldCo LLC CR S.R.L.	Costa Rica
GTP Costa Rica Holding CR, S.R.L.	Costa Rica
GTP Costa Rica, LLC	Delaware
GTP Highpointe Holdings, LLC	Delaware
GTP Holdco I, LLC	Delaware
GTP Holdings, LLC	Delaware

GTP Infrastructure I, LLC	Delaware
GTP Infrastructure II, LLC	Delaware
GTP Infrastructure III, LLC	Delaware
GTP Investments LLC	Delaware
GTP Issuer Holdco, LLC	Delaware
GTP LATAM Holdco S.L.	Spain
GTP LATAM Holdings B.V.	Netherlands
GTP LATAM Holdings Coöperatieve U.A.	Netherlands
GTP Latin Management, LLC	Delaware
GTP Operations CR, S.R.L.	Costa Rica
GTP Panama Holdings S. de R.L.	Panama
GTP Sites Hold Co., LLC	Delaware
GTP South Acquisitions II, LLC	Delaware
GTP Structures I, LLC	Delaware
GTP Structures II, LLC	Delaware
GTP Structures III, LLC	Delaware
GTP Structures Issuer, LLC	Delaware
GTP Structures IV, LLC	Delaware
GTP Structures V, LLC	Delaware
GTP TEC Holdings, LLC	Delaware
GTP Torres CR, S.R.L.	Costa Rica
GTP Towers Costa Rica Holdcorp S.R.L.	Costa Rica
GTP Towers I, LLC	Delaware
GTP Towers II, LLC	Delaware
GTP Towers III, LLC	Delaware
GTP Towers Issuer, LLC	Delaware
GTP Towers IV, LLC	Delaware
GTP Towers IX, LLC	Delaware
GTP Towers V, LLC	Delaware
GTP Towers VII, LLC	Delaware
GTP Towers VIII, LLC	Delaware
GTPI HoldCo, LLC	Delaware
Haysville Towers, LLC (6)	Kansas
HighPointe Management, LLC	Delaware
Iron & Steel Co., Inc.	Delaware
Lap do Brasil Empreendimentos Imobiliários Ltda	Brazil
LAP Inmobiliaria Limitada	Chile
MATC Digital, S. de R.L. de C.V.	Mexico
MATC Infraestructura, 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
Mid-Atlantic Tower Management, LLC	Delaware
National Tower, LLC	Massachusetts
New Loma Communications, Inc.	California
New Towers LLC	Delaware
PCS Structures Towers, LLC	Delaware

Red Spires Asset Sub, LLC	Delaware
Semaan Engineering Solutions, LLC	Delaware
Shreveport Tower Company	Louisiana
SpectraSite Communications, LLC	Delaware
SpectraSite, LLC	Delaware
T7 Ulysses Site Management LLC	Delaware
T8 Ulysses Site Management LLC	Delaware
TeleCom Towers, L.L.C.	Delaware
Torres Panamenas, S. de R.L.	Panama
Tower Management, Inc. (7)	Indiana
Tower Marketco Ghana Limited	Republic of Ghana
Towers of America, L.L.L.P.	Delaware
Transcend Infrastructure Holdings Pte. Ltd	Singapore
Transcend Infrastructure Private Limited	India
Uganda Tower Interco B.V. (5)	Netherlands
Ulysses Asset Sub I, LLC	Delaware
Ulysses Asset Sub II, LLC	Delaware
Ulysses Ground Lease Funding, LLC	Delaware
Ulysses Ground Lease Holdco, LLC	Delaware
UniSite, LLC	Delaware
UniSite/Omnipoint FL Tower Venture, LLC (8)	Delaware
UniSite/Omnipoint NE Tower Venture, LLC (8)	Delaware
UniSite/Omnipoint PA Tower Venture LLC (8)	Delaware
Verus Management One, LLC	Delaware
VM Ulysses Site Management LLC	Delaware
West Coast PCS Structures, LLC	Delaware
Wireless Resource Group, LLC	Oklahoma
WRG Holdings, LLC	Oklahoma

(1) 60% owned by AT South American C.V.

(2) Wholly owned by a majority owned subsidiary.

(3) 74.99% owned by at Netherlands Coöperatief U.A.

(4) 45.24% owned By American Tower, L.P. and 34.76% owned by American Towers LLC

(5) 51% owned by AT Sher Netherlands Coöperatief U.A.

(6) 66.667% owned by TeleCom Towers, L.L.C.

(7) 50% owned by Global Tower Assets IV, LLC.

(8) 95% owned by UniSite, LLC.