Exhibit 21.1



Global Crossing Limited

Subsidiaries of the Registrant



The following is a list of the Registrants subsidiaries, except for certain subsidiaries which do not in the aggregate constitute a significant
subsidiary as that term is defined in Rule 12b-2 under the Securities Exchange Act of 1934, all of which, unless otherwise indicated, are wholly-owned as of December 31, 2010.



|                                                                |  |  |                  | 
|--------------------------------------------------------------- |  |  | ---------------- | 
|Asia:                                                           |  |  |                  | 
|Global Crossing Australia Pty Limited                           |  |  | Australia        | 
|Global Crossing Hong Kong Limited                               |  |  | Hong Kong        | 
|Global Crossing Japan KK                                        |  |  | Japan            | 
|Global Crossing Singapore Pte. Ltd.                             |  |  | Singapore        | 
|                                                                | 
|Bermuda:                                                        |  |  |                  | 
|Atlantic Crossing Ltd.                                          |  |  | Bermuda          | 
|GC Crystal Holdings Ltd.                                        |  |  | Bermuda          | 
|Global Crossing Asia Holdings Ltd.                              |  |  | Bermuda          | 
|Global Crossing Australia Holdings Ltd.                         |  |  | Bermuda          | 
|Global Crossing Holdings Limited                                |  |  | Bermuda          | 
|Global Crossing International Networks Ltd.                     |  |  | Bermuda          | 
|Global Crossing International, Ltd.                             |  |  | Bermuda          | 
|Global Crossing Network Center Ltd.                             |  |  | Bermuda          | 
|Old GMS Holdings Ltd.                                           |  |  | Bermuda          | 
|PAC Panama Ltd.                                                 |  |  | Bermuda          | 
|South American Crossing Holdings Ltd.                           |  |  | Bermuda          | 
|                                                                | 
|Europe:                                                         |  |  |                  | 
|Fibernet GmbH                                                   |  |  | Germany          | 
|GC IMPSAT Holdings Nederland B.V.                               |  |  | Netherlands      | 
|GC Landing Co. GmbH                                             |  |  | Germany          | 
|GC Pan European Crossing France s.a.r.l.                        |  |  | France           | 
|Global Crossing Ireland Limited                                 |  |  | Ireland          | 
|Global Crossing Nederland B.V.                                  |  |  | Netherlands      | 
|Global Crossing PEC Belgium b.v.b.a.                            |  |  | Belgium          | 
|Global Crossing PEC Czech s.r.o.                                |  |  | Czech Republic   | 
|Global Crossing PEC Danmark ApS                                 |  |  | Denmark          | 
|Global Crossing PEC Deutschland GmbH                            |  |  | Germany          | 
|Global Crossing PEC Espana S.A.                                 |  |  | Spain            | 
|Global Crossing PEC Italia s.r.l.                               |  |  | Italy            | 
|Global Crossing PEC Luxembourg I S.a.r.l.                       |  |  | Luxembourg       | 
|Global Crossing PEC Luxembourg II S.a.r.l.                      |  |  | Luxembourg       | 
|Global Crossing PEC Norge AS                                    |  |  | Norway           | 
|Global Crossing PEC Österreich GmbH                             |  |  | Austria          | 
|Global Crossing PEC Switzerland AG                              |  |  | Switzerland      | 
|Global Crossing PEC Telekomünikasyon Hizmetleri Limited Şirketi |  |  | Turkey           | 
|Global Crossing PEC Holdings B.V.                               |  |  | Netherlands      | 
|Global Crossing Services Europe Limited                         |  |  | Ireland          | 
|Global Crossing Services Ireland Limited                        |  |  | Ireland          | 
|Global Crossing Sverige A.B.                                    |  |  | Sweden           | 
|Global Crossing Ukraine                                         |  |  | Ukraine          | 
|                                                                | 
|North America:                                                  |  |  |                  | 
|ALC Communications Corporation                                  |  |  | Delaware         | 
|Ameritel Management, Inc.                                       |  |  | British Columbia | 



---

|                                                |  |  |                     | 
|----------------------------------------------- |  |  | ------------------- | 
|Global Crossing Americas Solutions, Inc.        |  |  | Delaware            | 
|Global Crossing Bandwidth, Inc.                 |  |  | California          | 
|Global Crossing Development Co.                 |  |  | Delaware            | 
|Global Crossing Employee Services Inc.          |  |  | Delaware            | 
|Global Crossing Local Services, Inc.            |  |  | Michigan            | 
|Global Crossing North America, Inc.             |  |  | New York            | 
|Global Crossing North American Holdings, Inc.   |  |  | Delaware            | 
|Global Crossing Telecommunications-Canada, Ltd. |  |  | Canada              | 
|Global Crossing Telecommunications, Inc.        |  |  | Michigan            | 
|Global Crossing Telemanagement VA, LLC          |  |  | Virginia            | 
|GT Landing II Corp.                             |  |  | Delaware            | 
|Impsat Fiber Networks, Inc.                     |  |  | Delaware            | 
|International Optical Network, L.L.C.           |  |  | Delaware            | 
|Racal Telecommunications, Inc.                  |  |  | Delaware            | 
|                                                | 
|South America, Mexico & Caribbean:              |  |  |                     | 
|Corlew Investment S.A.                          |  |  | Uruguay             | 
|GC SAC Argentina S.R.L.                         |  |  | Argentina           | 
|G.C. St. Croix Company, Inc.                    |  |  | U.S. Virgin Islands | 
|Global Crossing Argentina S.A.                  |  |  | Argentina           | 
|Global Crossing Chile S.A.                      |  |  | Chile               | 
|Global Crossing Colombiana Ltda.                |  |  | Colombia            | 
|Global Crossing Colombia S.A.                   |  |  | Colombia            | 
|Global Crossing Comunicacoes do Brasil Ltda.    |  |  | Brazil              | 
|Global Crossing Comunicaciones Ecuador S.A.     |  |  | Ecuador             | 
|Global Crossing Costa Rica S.R.L.               |  |  | Costa Rica          | 
|Global Crossing Landing Mexicana S. de R.L.     |  |  | Mexico              | 
|Global Crossing Mexicana, S. de R.L. de C.V.    |  |  | Mexico              | 
|Global Crossing Mexicana II, S. De R.L. de C.V. |  |  | Mexico              | 
|Global Crossing Panama, Inc.                    |  |  | Panama              | 
|Global Crossing Servicios, S. de R. L. de C. V. |  |  | Mexico              | 
|Global Crossing Venezuela S.A.                  |  |  | Venezuela           | 
|Impsat Participacoes E Comercial Ltda.          |  |  | Brazil              | 
|Impsat Peru S.A.                                |  |  | Peru                | 
|SAC Brasil Holding Ltda.                        |  |  | Brazil              | 
|SAC Brasil S.A.                                 |  |  | Brazil              | 
|SAC Panama, S.A.                                |  |  | Panama              | 
|SAC Peru S.R.L.                                 |  |  | Peru                | 
|Telecom Infrastructure Hardware S.R.L.          |  |  | Peru                | 
|                                                | 
|United Kingdom:                                 |  |  |                     | 
|Fibernet UK Limited                             |  |  | England & Wales     | 
|GC Impsat Holdings I Limited                    |  |  | England & Wales     | 
|GC Impsat Holdings II Limited                   |  |  | England & Wales     | 
|GC Impsat Holdings III Limited                  |  |  | England & Wales     | 
|Global Crossing (Bidco) Limited                 |  |  | England & Wales     | 
|Global Crossing Conferencing Limited            |  |  | England & Wales     | 
|Global Crossing Europe Limited                  |  |  | England & Wales     | 
|Global Crossing Financial Markets Limited       |  |  | England & Wales     | 
|Global Crossing (UK) Finance Plc                |  |  | England & Wales     | 
|Global Crossing (UK) Telecommunications Limited |  |  | England & Wales     | 
|Pan American Crossing UK Ltd                    |  |  | England & Wales     |