Exhibit 21.1—List of Subsidiaries of the Registrant
| Name of Subsidiary |
Jurisdiction of Organization | |
| Azea Networks, Inc. | Delaware, United States of America | |
| Neovus, Inc. | Delaware, United States of America | |
| PMX Holdings, Limited | British Virgin Islands | |
| Success Pearl Limited | Seychelles | |
| Xtera Asia Holdings, LLC | Delaware, United States of America | |
| Xtera Comunicacoes do Brasil LTDA. | Brazil | |
| Xtera Communications Canada, Inc. | Canada | |
| Xtera Communications Ltd. | United Kingdom | |
| Xtera Communications Taiwan Co., Ltd. | Taiwan | |
| Xtera Communications Hong Kong Limited | Hong Kong |