Document

Exhibit 21

SUBSIDIARIES OF AMERICAN TOWER CORPORATION


Subsidiary						Jurisdiction of Incorporation or Organization


10 Presidential Way Associates, LLC			Delaware
52 Eighty Partners, LLC			Delaware
52 Eighty Tower Partners I, LLC			Delaware
ACC Tower Sub, LLC			Delaware
ActiveX Telebroadband Services Private Limited			India
Adquisiciones y Proyectos Inalámbricos, S. de R. L. de C.V.			Mexico
Alternative Networking LLC			Florida
American Tower Asset Sub II, LLC			Delaware
American Tower Asset Sub, LLC			Delaware
American Tower Charitable Foundation, Inc.			Delaware
American Tower Delaware Corporation			Delaware
American Tower Depositor Sub, LLC			Delaware
American Tower do Brasil – Cessão de Infraestruturas S.A.			Brazil
American Tower do Brasil – Comunicação Multimídia Ltda.			Brazil
American Tower España, S.L. (2)			Spain
American Tower Guarantor Sub, LLC			Delaware
American Tower Holding Sub II, LLC			Delaware
American Tower Holding Sub, LLC			Delaware
American Tower Inmosites, S.L.U. (3)			Spain
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 Latam, S.L.U.			Spain
American Tower LLC			Delaware
American Tower Management, LLC			Delaware
American Towers LLC			Delaware
AppleCore GP LLC (5)			Delaware
AppleCore LP (1)			Delaware
Appleseed Holdco REIT LLC (3)			Delaware
Applestem LP			Delaware
AT Atlantic Holding LLC (1)			Delaware
AT Iberia C.V. (2)			Netherlands
AT Kenya C.V.			Netherlands
AT Netherlands C.V.			Netherlands
AT Netherlands Coöperatief U.A			Netherlands
AT Rhine C.V. (2)			Netherlands
AT Sher Netherlands Coöperatief U.A.			Netherlands
AT South America C.V.			Netherlands
ATC Africa Holding B.V.			Netherlands


ATC Africa Shared Services (Pty) Ltd			South Africa
ATC Antennas Holding LLC			Delaware
ATC Antennas LLC			Delaware
ATC Argentina Coöperatief U.A.			Netherlands
ATC Argentina Holding LLC			Delaware
ATC Asia Pacific Pte. Ltd.			Singapore
ATC Atlantic C.V. (2)			Netherlands
ATC Atlantic I B.V. (2)			Netherlands
ATC Atlantic II B.V. (3)			Netherlands
ATC Atlantic IV B.V. (2)			Netherlands
ATC Backhaul LLC			Delaware
ATC Brasil – Serviços de Conectividades Ltda.			Brazil
ATC Brazil Holding LLC			Delaware
ATC Brazil I LLC			Delaware
ATC Brazil II LLC			Delaware
ATC Burkina Faso S.A.			Burkina Faso
ATC Canada ULC			Canada
ATC Chile Holding LLC			Delaware
ATC Colombia B.V.			Netherlands
ATC Colombia Holding I LLC			Delaware
ATC Colombia Holding LLC			Delaware
ATC Colombia I LLC			Delaware
ATC CSR Foundation India			India
ATC Edge LLC			Delaware
ATC EH GmbH & Co KG			Germany
ATC Ethiopia Infrastructure Development Private Limited Company			Ethiopia
ATC Europe C.V. (1)			Netherlands
ATC Europe Coöperatief U.A.			Netherlands
ATC Europe LLC			Delaware
ATC European Holdings LLC (3)			Delaware
ATC Fibra de Colombia, S.A.S.			Colombia
ATC France Holding II SAS			France
ATC France Holding SAS			France
ATC France Réseaux SAS			France
ATC France Services SAS			France
ATC France SNC			France
ATC Germany Holding I B.V. (3)			Netherlands
ATC Germany Holding II B.V.			Netherlands
ATC Germany Holdings GmbH			Germany
ATC Germany Services GmbH			Germany
ATC Ghana ServiceCo Limited			Ghana
ATC Global Employment B.V.			Netherlands
ATC GP GmbH			Germany
ATC Green Grass LLC			Delaware
ATC Heston B.V.			Netherlands
ATC Iberia Holding LLC (3)			Delaware
ATC India Infrastructure Private Limited (1)			India
ATC Indoor DAS Holding LLC			Delaware
ATC Indoor DAS LLC			Delaware


ATC International Coöperatief U.A.			Netherlands
ATC International Financing B.V.			Netherlands
ATC International Financing II B.V.			Netherlands
ATC International Holding Corp.			Delaware
ATC Iris I LLC			Delaware
ATC Kenya Operations Limited			Kenya
ATC Kenya Services Limited			Kenya
ATC Managed Sites Holding LLC			Delaware
ATC Managed Sites LLC			Delaware
ATC MexHold LLC			Delaware
ATC Mexico Holding LLC			Delaware
ATC MIP III REIT Iron Holdings LLC			Delaware
ATC Niger Wireless Infrastructure S.A.			Niger
ATC Nigeria Coöperatief U.A.			Netherlands
ATC Nigeria Foundation Limited by Guarantee			Nigeria
ATC Nigeria Holding LLC			Delaware
ATC Nigeria Wireless Infrastructure Limited			Nigeria
ATC On Air + LLC			Delaware
ATC Operations LLC			Delaware
ATC Outdoor DAS, LLC			Delaware
ATC Paraguay Holding LLC			Delaware
ATC Paraguay S.R.L			Paraguay
ATC Peru Holding LLC			Delaware
ATC Ponderosa B-I LLC			Delaware
ATC Ponderosa B-II LLC			Delaware
ATC Ponderosa K LLC			Delaware
ATC Ponderosa K-R LLC			Delaware
ATC Rhine Holding LLC (3)			Delaware
ATC Scala Operations, S.L.U. (3)			Spain
ATC Sequoia LLC			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.			Colombia
ATC South Africa Investment Holdings (Proprietary) Limited			South Africa
ATC South Africa Services Pty Ltd			South Africa
ATC South Africa Wireless Infrastructure (Pty) Ltd			South Africa
ATC South America Holding LLC			Delaware
ATC South LLC			Delaware
ATC Tower (Ghana) LTD			Republic of Ghana
ATC Tower Services LLC			Delaware
ATC TRS I LLC			Delaware
ATC TRS II LLC			Delaware
ATC TRS III LLC			Delaware
ATC TRS IV LLC			Delaware
ATC TRS V LLC			Delaware
ATC Uganda Limited			Uganda
ATC Uganda ServiceCo - SMC Limited			Uganda
ATC Watertown LLC			Delaware


ATC WiFi LLC			Delaware
ATS-Needham LLC			Massachusetts
Blue Sky Towers Pty Ltd			South Africa
Blue Transfer Sociedad Anonima			Paraguay
Broadcast Towers, LLC			Delaware
California Tower, Inc.			Delaware
Cell Site NewCo II, LLC			Delaware
Cell Tower Lease Acquisition LLC			Delaware
Central States Tower Holdings, LLC			Delaware
CNC2 Associates, LLC			Delaware
Comfluent Acquisition, L.L.C.			Delaware
Communications Properties, Inc.			Delaware
Comunicaciones y Consumos S.R.L.			Argentina
Connectivity Infrastructure Services Limited			Nigeria
CoreSite 1099 14th Street NW, L.L.C.			Delaware
CoreSite 1275 K Street, L.L.C.			Delaware
CoreSite 32 Avenue of the Americas, L.L.C.			Delaware
CoreSite AT1 LLC			Georgia
CoreSite Data Center Services, Inc.			Delaware
CoreSite Denver, L.L.C.			Colorado
CoreSite DE3 DCS Inc. (6)			Delaware
CoreSite DE3 Venture LP (5)			Delaware
CoreSite GP LLC			Delaware
CoreSite One Wilshire, L.L.C.			Delaware
CoreSite RE DE3 GP LLC (4)			Delaware
CoreSite Real Estate 12100 Sunrise Valley Drive L.L.C.			Delaware
CoreSite Real Estate 1656 McCarthy GP, L.L.C.			Delaware
CoreSite Real Estate 1656 McCarthy, L.P.			Delaware
CoreSite Real Estate 2 Emerson Lane, L.L.C.			Delaware
CoreSite Real Estate 2115 NW 22nd Street, L.L.C.			Delaware
CoreSite Real Estate 2901 Coronado GP, L.L.C.			Delaware
CoreSite Real Estate 2901 Coronado, L.P.			Delaware
CoreSite Real Estate 2950 Stender GP, L.L.C.			Delaware
CoreSite Real Estate 2950 Stender, L.P.			Delaware
CoreSite Real Estate 2972 Stender GP, L.L.C.			Delaware
CoreSite Real Estate 2972 Stender, L.P.			Delaware
CoreSite Real Estate 3001 Coronado GP, L.L.C.			Delaware
CoreSite Real Estate 3001 Coronado, L.P.			Delaware
CoreSite Real Estate 3032 Coronado GP, L.L.C.			Delaware
CoreSite Real Estate 3032 Coronado, L.P.			Delaware
CoreSite Real Estate 3045 Stender GP, L.L.C.			Delaware
CoreSite Real Estate 3045 Stender, L.P.			Delaware
CoreSite Real Estate 427 S. LaSalle, L.L.C.			Delaware
CoreSite Real Estate 55 S. Market Street, L.L.C.			Delaware
CoreSite Real Estate 70 Innerbelt, L.L.C.			Delaware
CoreSite Real Estate 900 N. Alameda GP, L.L.C.			Delaware
CoreSite Real Estate AT2 LLC			Delaware
CoreSite Real Estate CH1 Annex, L.L.C.			Delaware
CoreSite Real Estate CH2, L.L.C.			Delaware


CoreSite Real Estate DE3 LLC			Delaware
CoreSite Real Estate LA2 & LA3, L.P.			Delaware
CoreSite Real Estate LA5 GP LLC			Delaware
CoreSite Real Estate LA5 LP			Delaware
CoreSite Real Estate MI2 LLC			Delaware
CoreSite Real Estate NY4 LLC			Delaware
CoreSite Real Estate OR1 LLC			Delaware
CoreSite Real Estate RA1 LLC			Delaware
CoreSite Real Estate Sunrise Technology Park, L.L.C.			Delaware
CoreSite Real Estate SV9 GP, L.L.C.			Delaware
CoreSite Real Estate SV9, L.P.			Delaware
CoreSite Real Estate SV10 GP LLC			Delaware
CoreSite Real Estate SV10 LP			Delaware
CoreSite, L.L.C.			Delaware
CoreSite, L.P.			Delaware
DCS Tower Sub, LLC			Delaware
Eaton Towers Ghana Limited			Ghana
Eaton Towers Holdings Limited			Jersey
Eaton Towers Kenya Limited			Kenya
Eaton Towers Limited			United Kingdom
Ghana Tower InterCo B.V.			Netherlands
Global Tower Assets III, LLC			Delaware
Global Tower Assets, LLC			Delaware
Global Tower Holdings, LLC			Delaware
Global Tower Services, LLC			Delaware
Global Tower, LLC			Delaware
Gondola Tower Holdings LLC			Delaware
Grain HoldCo Parent, LLC			Delaware
Grain HoldCo, LLC			Delaware
GrainComm I, LLC			Delaware
GrainComm II, LLC			Delaware
GrainComm III, LLC			Delaware
GrainComm LLC			Delaware
GrainComm Marketing, LLC			Delaware
GrainComm V, LLC			Delaware
GTP Acquisition Partners I, LLC			Delaware
GTP Acquisition Partners II, LLC			Delaware
GTP Acquisition Partners III, LLC			Delaware
GTP Costa Rica Finance, LLC			Delaware
GTP Infrastructure I, LLC			Delaware
GTP Infrastructure II, LLC			Delaware
GTP Infrastructure III, LLC			Delaware
GTP Investments LLC			Delaware
GTP LATAM Holdings B.V.			Netherlands
GTP LatAm Holdings Coöperatieve U.A.			Netherlands
GTP Operations CR, S.R.L.			Costa Rica
GTP South Acquisitions II, LLC			Delaware
GTP Structures I, LLC			Delaware
GTP Structures II, LLC			Delaware


GTP Torres CR, S.R.L.			Costa Rica
GTP Towers I, LLC			Delaware
GTP Towers II, LLC			Delaware
GTP Towers III, 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
GTP TRS I LLC			Delaware
GTPI HoldCo, LLC			Delaware
Haysville Towers, LLC (1)			Kansas
InSite (BCEC) LLC			Delaware
InSite (MBTA) LLC			Delaware
InSite Borrower, LLC			Delaware
InSite Guarantor, LLC			Delaware
InSite Hawaii, LLC			Delaware
InSite Issuer, LLC			Delaware
InSite Licensing, LLC			Delaware
InSite Tower Services LLC			Delaware
InSite Towers Development 2, LLC			Delaware
InSite Towers Development LLC			Delaware
InSite Towers International 2, LLC			Delaware
InSite Towers International Development LLC			Delaware
InSite Towers International, LLC			Delaware
InSite Towers of Puerto Rico, LLC			Puerto Rico
InSite Towers, LLC			Delaware
InSite Wireless Development LLC			Delaware
InSite Wireless Group, LLC			Delaware
Invisible IWG Holdings, LLC			Delaware
Invisible Towers LLC			Delaware
IW Equipment, LLC			Delaware
IWD Equipment, LLC			Delaware
IWG Holdings, LLC			Delaware
IWG II Holdings, LLC			Delaware
IWG II, LLC			Delaware
IWG Towers Assets I, LLC			Delaware
IWG Towers Assets II, LLC			Delaware
IWG-TLA Encanto 1, LLC			Delaware
IWG-TLA Encanto 3, LLC			Delaware
IWG-TLA Holdings, LLC			Delaware
IWG-TLA Media 2, LLC			Delaware
IWG-TLA Media, LLC			Delaware
IWG-TLA Telecom, LLC			Delaware
Kirtonkhola Tower Bangladesh Limited (1)			Bangladesh
Lap do Brasil Empreendimentos Imobiliários Ltda			Brazil
LAP Inmobiliaria Limitada			Chile
LAP Inmobiliaria S.R.L.			Peru
LL B Sheet 1, LLC			Delaware


Loxel SAS			France
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
MC New Macland Properties, LLC			Georgia
MCSU Properties, LLC			Georgia
MHB Tower Rentals of America, LLC			Mississippi
Microwave, Inc.			Delaware
MIP III Iron Holdings LLC			Delaware
Mountain Communications, LLC			California
Municipal Bay, LLC			Delaware
Municipal-Bay Holdings, LLC			Delaware
New Towers LLC			Delaware
PCS Structures Towers, LLC			Delaware
PT. Transcend Tower Infrastructure Indonesia (1)			Indonesia
R-CAL I, LLC			Delaware
Repeater Communications Group I, LLC			New York
Repeater Communications Group II, LLC			New York
Repeater Communications Group III, LLC			New York
Repeater Communications Group IV, LLC			New York
Repeater Communications Group of New York, LLC			New York
Repeater Communications Group V, LLC			New York
Repeater Communications Group VI, LLC			New York
Repeater Communications Group, LLC			New York
Repeater IWG Holdings, LLC			Delaware
Richland Towers, LLC			Delaware
RSA Media LLC			Massachusetts
SpectraSite Communications, LLC			Delaware
SpectraSite, LLC			Delaware
T8 Ulysses Site Management LLC			Delaware
Telecom Lease Advisors Management 2, LLC			Delaware
TLA PR-2, LLC			Delaware
Tower Management, Inc. (4)			Indiana
TowerCo1 Infraestrutura e Participações S.A.			Brazil
Towers of America, L.L.L.P.			Delaware
Transcend Infrastructure Holdings Pte. Ltd.			Singapore
Transcend Towers Infrastructure (Philippines), Inc.			Philippines
Tysons II DAS, LLC			Delaware
Uganda Tower Interco B.V.			Netherlands
Ulysses Asset Sub I, LLC			Delaware
Ulysses Asset Sub II, LLC			Delaware
UniSite, LLC			Delaware
UniSite/Omnipoint FL Tower Venture, LLC (1)			Delaware
UniSite/Omnipoint NE Tower Venture, LLC (1)			Delaware
UniSite/Omnipoint PA Tower Venture LLC (1)			Delaware
U.S. Colo, LLC			California
U.S. Colo. LLC			Nevada
US Colo Holding Company, L.L.C.			Delaware
US Colo @ 800 Hope LLC			Nevada


Vangard Wireless, LLC			Delaware
Verus Management One, LLC			Delaware
Viridi IWG Holdings, LLC			Delaware

(1)Majority interest owned by a wholly owned subsidiary.

(2)Majority interest owned by a majority owned subsidiary.

(3)Wholly owned by a majority owned subsidiary.

(4)50% owned by a wholly owned subsidiary.

(5)Minority interest owned by a wholly owned subsidiary.

(6)Wholly owned by a joint venture subsidiary.