Exhibit 21.01

DOMESTIC SUBSIDIARIES



|                                                            |  |                                                    
|----------------------------------------------------------- |  | ---------------------------------------------------
|IDT America of Virginia, LLC (DE)                           |  | IDT Spectrum, Inc. (DE)                            
|American Shale Oil Corporation (DE)                         |  | IDT Spectrum, LLC (DE)                             
|American Shale Oil, LLC (DE), Assumed Name in TX: AMSO, LLC |  | IDT Stored Value Services, Inc. (DE)               
|AMSO Holdings I, Inc. (DE)                                  |  | IDT Telecom, Inc. (DE)                             
|AMSO Holdings, LLC (DE)                                     |  | IDT Telecom, LLC (DE)                              
|Broad-Atlantic Associates, LLC (DE)                         |  | IDT Wireless, Inc. (DE)                            
|Broad-Atlantic Realty, LLC (DE)                             |  | King Telecom, LLC (DE)                             
|Dipchip Corp. (NY)                                          |  | Net2Phone Cable Telephony, LLC (DE)                
|Entrix Telecom, Inc. (DE)                                   |  | Net2Phone Global Services, LLC Net2Phone, Inc. (DE)
|Genie Energy Corporation (DE)                               |  | North American Energy, Inc. (DE)                   
|IDT 225 Old NB Road Holdings, Inc. (DE)                     |  | PICUP, LLC (DE)                                    
|IDT 225 Old NB Road, LLC (DE)                               |  | Telecard Network, L.L.C. (NJ)                      
|IDT 226 Old NB Road Holdings, Inc. (DE)                     |  | Touch-N-Buy, LLC (DE)                              
|IDT 226 Old NB Road, LLC (DE)                               |  | TúYo Mobile, LLC (DE)                              
|IDT Advanced Communication Services, LLC (NJ)               |  | Union CT Telecom, L.L.C. (NJ)                      
|IDT America, Corp. (NJ)                                     |  | Union Romerias Georgia, LLC (DE)                   
|IDT Capital, Inc. (DE)                                      |  | Union Telecard Alliance, LLC (DE)                  
|IDT Domestic Telecom, Inc. (DE), NJ dba Mobiltalker         |  | Union Telecard Arizona, LLC (NV)                   
|IDT Domestic-Union, LLC (DE)                                |  | Union Telecard Connecticut, LLC (DE)               
|IDT Energy, Inc. (DE)                                       |  | Union Telecom Texas LLC (TX)                       
|IDT Financial Services, LLC (DE)                            |  | UTA Web Sales LLC (DE)                             
|IDT International Telecom, Inc. (DE)                        |  | Virtual Power Hedging, LLC (DE)                    
|IDT Investments Inc. (NV)                                   |  | Winstar Holdings, LLC (DE)                         
|                                                            |  | Winstar Spectrum, LLC (DE)                         
|                                                            |  | Zedge Holdings, Inc. (DE)                          



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FOREIGN SUBSIDIARIES



|                                                                                   |  |                     
|---------------------------------------------------------------------------------- |  | --------------------
|Name                                                                               |  | Country of Formation
|DirectTel Dutch Holdings B.V.                                                      |  | Netherlands         
|DYP C.V.                                                                           |  | Netherlands         
|Expercom S.A.                                                                      |  | Belgium             
|Genie Dutch Holdings B.V.                                                          |  | Netherlands         
|Genie Energie B.V.                                                                 |  | Netherlands         
|Genie Energy International (Genie Energy International is a registered trade name) |  | Netherlands         
|Homer Dutch Holdings B.V.                                                          |  | Netherlands         
|IDT Brasil Telecomunicações Ltda                                                   |  | Brazil              
|IDT Brazil Limitada                                                                |  | Brazil              
|IDT Card Services Ireland Limited                                                  |  | Ireland             
|IDT Chile S.A.                                                                     |  | Chile               
|IDT Corporation de Argentina S.A.                                                  |  | Argentina           
|IDT Dutch Holdings B.V.                                                            |  | Netherlands         
|IDT Europe B.V.B.A.                                                                |  | Belgium             
|IDT Financial Services Holding Limited                                             |  | Gibraltar           
|IDT Financial Services Limited                                                     |  | Gibraltar           
|IDT France SARL                                                                    |  | France              
|IDT Germany GmbH                                                                   |  | Germany             
|IDT Global Limited                                                                 |  | United Kingdom      
|IDT Inter Direct Tel Sweden AB                                                     |  | Sweden              
|IDT Italia S.R.L.                                                                  |  | Italy               
|IDT Netherlands B.V.                                                               |  | Netherlands         
|IDT Peru S.R.L.                                                                    |  | Peru                
|IDT Puerto Rico & Co.                                                              |  | Puerto Rico         
|IDT Switzerland GmbH                                                               |  | Switzerland         
|IDT Telecom Asia Pacific (Australia) PTY. LTD.                                     |  | Australia           
|IDT Telecom Asia Pacific Limited                                                   |  | Hong Kong           
|IDT Telecom South Africa (PTY) LTD                                                 |  | South Africa        
|Interdirect Tel Limited                                                            |  | Ireland             
|Israel Energy Initiatives Ltd.                                                     |  | Israel              
|MJP C.V.                                                                           |  | Netherlands         
|MST Dutch Holdings B.V.                                                            |  | Netherlands         
|NewPhone Dutch Holdings B.V.                                                       |  | Netherlands         
|Prepaid Cards B.V.B.A.                                                             |  | Belgium             
|Pryd Dutch Holdings B.V.                                                           |  | Netherlands         
|STA Dutch Holdings B.V.                                                            |  | Netherlands         
|Strategic Dutch Holdings B.V.                                                      |  | Netherlands         
|TimeTel Dutch Holdings B.V.                                                        |  | Netherlands         
|TLT Dutch Holdings B.V.                                                            |  | Netherlands         
|WorldTalk Dutch Holdings B.V.                                                      |  | Netherlands         
|Zedge Europe AS                                                                    |  | Norway