Asia:

Global Crossing Australia Pty Limited

Global Crossing Hong Kong Limited

Global Crossing Japan KK

Global Crossing Singapore Pte. Ltd.

Bermuda:

Atlantic Crossing Ltd.

GC Crystal Holdings Ltd.

Global Crossing Asia Holdings Ltd.

Global Crossing Australia Holdings Ltd.

Global Crossing Holdings Limited

Global Crossing International Networks Ltd.

Global Crossing International, Ltd.

Global Crossing Limited

Global Crossing Network Center Ltd.

Old GMS Holdings Ltd.

PAC Panama Ltd.

South American Crossing Holdings Ltd.

Europe:

Fibernet GmbH

GC Hungary Holdings Vagyonkezelö Korlátolt Felelösségü Társaság

GC Landing Co. GmbH

GC Pan European Crossing France s.a.r.l.

Global Crossing PEC Holdings B.V.

GC Pan European Crossing Networks B.V.

Global Crossing PEC Österreich GmbH

Global Crossing België b.v.b.a.

Global Crossing Cyprus Holdings Limited

Global Crossing Ireland Limited

Global Crossing Nederland B.V.

Global Crossing PEC Belgium b.v.b.a.

Global Crossing PEC Czech s.r.o.

Global Crossing PEC Danmark ApS

Global Crossing PEC Deutschland GmbH

Global Crossing PEC Espana S.A.

Global Crossing PEC Italia s.r.l.

Global Crossing PEC Luxembourg I S.a.r.l.

Global Crossing PEC Luxembourg II S.a.r.l.

Global Crossing PEC Nederland B.V.

Global Crossing PEC Norge AS

Global Crossing PEC Switzerland AG

Global Crossing Services Europe Limited

Global Crossing Services Ireland Limited

Global Crossing Sverige A.B .

International Satellite Communication Holding Aktiengesellschaft

North America:

ALC Communications Corporation

Ameritel Management, Inc.

Budget Call Long Distance, Inc.

Global Crossing Bandwidth, Inc.

Global Crossing Development Co.

Global Crossing Employee Services Inc.

Global Crossing Local Services, Inc.

Global Crossing North America, Inc.

Global Crossing North American Holdings, Inc.

Global Crossing North American Networks, Inc.

Global Crossing Telecommunications-Canada, Ltd.

Global Crossing Telecommunications, Inc.

Global Crossing Telemanagement VA, LLC

Global Crossing Telemanagement, Inc.

GT Landing II Corp.

Impsat Fiber Networks, Inc.

Global Crossing Americas Solutions, Inc.

International Optical Network, L.L.C.

Racal Telecommunications, Inc.

South America, Mexico & Caribbean:

Corlew Investment S.A.

Deason Investment S.A.

GC SAC Argentina S.R.L.

G.C. St. Croix Company, Inc.

Global Crossing Argentina S.A.

Global Crossing Chile S.A.

Global Crossing Colombiana Ltda.

Global Crossing Colombia S.A.

Global Crossing Comunicacoes do Brasil Ltda.

Global Crossing Comunicaciones Ecuador S.A.

Global Crossing Costa Rica S.R.L.

Global Crossing Landing Mexicana S. de R.L.

Global Crossing Mexicana, S. de R.L. de C.V.

Global Crossing Mexicana II, S. De R.L. de C.V.

Global Crossing Panama, Inc.

Global Crossing Servicios, S. de R. L. de C. V.

Global Crossing Venezuela S.A.

Impsat Participacoes E Comercial Ltda.

Impsat Peru S.A.

SAC Brasil Holding Ltda.

SAC Brasil S.A.

SAC Colombia Limitada (In process of liquidation)

SAC Panama, S.A.

SAC Peru S.R.L.

Telecom Infrastructure Hardware S.R.L.

United Kingdom:

Fibernet Group Limited

Fibernet Holdings Limited

Fibernet Limited

Fibernet Quest Limited

Fibernet UK Limited

GC Impsat Holdings I Plc

GC Impsat Holdings II Limited

GC Impsat Holdings III Limited

GC IMPSAT Holdings Nederland B.V.

Geoconference Limited

Global Crossing (Bidco) Limited

Global Crossing Conferencing Limited

Global Crossing Europe Limited

Global Crossing Financial Markets Limited

Global Crossing (UK) Finance Plc

Global Crossing (UK) Telecommunications Limited

Pan American Crossing UK Ltd