EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT Jurisdiction of Subsidiary Organization WCI de Argentina Argentina WCI Cayman, Inc. Cayman Islands Telatin (non-operational subsidiary) Television Interactiva, S.A. Costa Rica GBnet, S.A. GBNet, S.A. Dominican Republic GBnet, S.A. de C.V. El Salvador Wireless Communications Holding Guatemala, S.A. Guatemala Wireless Communications License Holding Guatemala, S.A. Wireless Communications Operations Guatemala, S.A. Grupo Metrotelecom, S.A. Cybernet de Centroamerica, S.A. Cybercable de Centroamerica, S.A. Metrotelecom de Centroamerica, S.A. GBnet, S.A. GBnet de Honduras, S.A. Honduras GBnet, S.A. Nicaragua Convergence Communications, S.A. de C.V. Mexico Convergence Services, S.A. de C.V. International Van, S.A. de C.V. Auckland Independent Television Ltd. New Zealand Interamerican Telecom, Inc. Panama Convergence Communications Panama Inc. GBnet, Inc. Corale Resources, Inc. Convergence Communications de Venezuela CA Venezuela Interamerican Net de Venezuela GBnet Corporation British Virgin Is. Telecom Investment Corporation Delaware GBNet Latin American Broadband, Inc. (New CCI) Nevada