EXHIBIT 21 SUBSIDIARIES NAP of the Americas, West Inc., a Florida corporation Park West Telecommunications Investors, Inc., a Florida corporation TECOTA Services Corp., a Delaware corporation Terremark Trademark Holdings, Inc., a Nevada corporation TerreNAP Data Centers, Inc., a Florida corporation TerreNAP Services, Inc., a Florida corporation Optical Communications, Inc., a Florida corporation Park West Telecommunications Investors, Inc. owns 50% of: Technology Center of the Americas, Inc., a Florida corporation Technology Center of the Americas, Ltd., a Florida limited partnership TECOTA Services Corp. owns a 0.84% interest in: Technology Center of the Americas, LLC, a Delaware limited liability corporation TerreNAP Data Centers, Inc., is the sole shareholder of: NAP of the Americas, Inc., a Florida corporation Terremark Asia Company, Ltd., a Bermuda corporation Terremark Latin America, Inc., a Florida corporation Terremark NAP Services, Inc. is the sole shareholder of: Terremark Financial Services, Inc., a Florida corporation Terremark Fortune House #1, Inc., a Florida corporation Terremark Management Services, Inc., a Florida corporation Terremark Realty, Inc., a Florida corporation Terremark Technology Contractors, Inc., a Florida corporation Technology Center of the Americas, Inc. owns a minority interest in: Technology Center of the Americas, Ltd., a Florida limited partnership Terremark Latin America, Inc. is the sole shareholder of: Spectrum Telecommunications Corp., a Delaware corporation Terremark Latin America, Inc. owns 99% of: Terremark Latin America de Argentina, SA, an Argentine corporation Terremark Latin America (Brasil) Ltda, a Brazil corporation Terremark Latin America de Mexico, SA de CV, a Mexican corporation Terremark Latin America, Inc. is a minority shareholder of: Terremark do Brasil Ltda, a Brazil corporation Terremark Latin America (Brasil) Ltda, a Brazil corporation, is a majority shareholder of: Terremark do Brasil Ltda, a Brazil corporation * Terremark Worldwide, Inc. owns a minority shareholder interest in: Terremark Latin America de Argentina, SA, an Argentine corporation Terremark Latin America (Brasil) Ltda, a Brazil corporation Terremark Latin America de Mexico, SA de CV, a Mexican corporation