Exhibit 21.1

SUBSIDIARIES OF REGISTRANT

SYNIVERSE HOLDINGS, INC.

SUBSIDIARIES OF REGISTRANT

AS OF DECEMBER 31, 2009



|                                                                 |  |                                             
|---------------------------------------------------------------- |  | --------------------------------------------
|Subsidiary Name                                                  |  | State or Other Jurisdiction of
Incorporation
|Syniverse Technologies, Inc.                                     |  | Delaware                                    
|Syniverse Technologies Brience LLC                               |  | Delaware                                    
|Perfect Profit International Limited                             |  | British Virgin Islands                      
|Syniverse Technologies S.R.L. de C.V.                            |  | Mexico                                      
|Syniverse Technologies Korea Yuhan Hoesa                         |  | South Korea                                 
|Syniverse Technologies S.R.L.                                    |  | Argentina                                   
|Syniverse Technologies of Virginia, Inc.                         |  | Virginia                                    
|Syniverse Technologies Prestacao de Servicos Ltda                |  | Brazil                                      
|Syniverse Technologies K.K.                                      |  | Japan                                       
|Syniverse Technologies BV                                        |  | Netherlands                                 
|Syniverse Holdings Limited                                       |  | United Kingdom                              
|Syniverse Technologies LLC                                       |  | Delarware                                   
|Syniverse Technologies Limited                                   |  | United Kingdom                              
|Syniverse Technologies (India) Private Ltd                       |  | India                                       
|Syniverse Technologies (Clearing Solutions-Asia Pacific) Limited |  | Bermuda                                     
|Highwoods Corporation                                            |  | Delaware                                    
|Syniverse Technologies Limited Luxembourg S.a.r.l.               |  | Luxembourg                                  
|Syniverse Technologies (Clearing Solutions) Limited              |  | United Kingdom                              
|Syniverse Technologies (Financial Clearing) Limited              |  | United Kingdom                              
|Syniverse Technologies GmbH                                      |  | Germany                                     
|Skylead Assets Limited                                           |  | British Virgin Islands                      
|Vickwood Holdings Limited                                        |  | British Virgin Islands                      
|Syniverse Technologies Network Solutions (Singapore) Pte Ltd     |  | Singapore                                   
|PT Syniverse Technologies Indonesia                              |  | Indonesia                                   
|Syniverse Technologies (Singapore) Pte Ltd                       |  | Singapore                                   
|Syniverse Technologies (Malaysia) Sdn Bhd                        |  | Malaysia                                    
|Syniverse Technologies (Australia) Pty Ltd                       |  | Australia                                   
|Grand Join Investments Limited                                   |  | British Virgin Islands                      
|Syniverse Technologies (Network Solutions Asia Pacific) Limited  |  | Hong Kong                                   
|Syniverse Technologies (China) Limited                           |  | Hong Kong                                   
|Syniverse Technologies Asia Pacific Limited                      |  | Hong Kong                                   
|Interactive Technology Applications Limited                      |  | Hong Kong                                   
|Syniverse Technologies (Shenchen) Limited                        |  | PRC                                         
|Syniverse Technologies (Beijing) Limited                         |  | PRC                                         
|Syniverse Technologies Services (India) Private Limited          |  | India                                       
|Syniverse Holdings (Mauritius)                                   |  | Mauritius                                   
|The Rapid Roaming Company                                        |  | Florida                                     
|Syniverse ICX Corporation                                        |  | Delaware