EXHIBIT 23.1
 
                        CONSENT OF INDEPENDENT AUDITORS
 
  We consent to the incorporation by reference of our report dated September
28, 1998 with respect to
the consolidated financial statements and schedule of IDT Corporation included
in this Annual Report
(Form 10-K/A) for the year ended July 31, 1998, in each of the following:
 
  .Registration Statement No. 333-37141 on Form S-3;
 
  .Registration Statement No. 333-19727 on Form S-8;
 
  .Registration Statement No. 333-42267 on Form S-8;
 
  .Registration Statement No. 333-45199 on Form S-3;
 
  .Registration Statement No. 333-53719 on Form S-3; and
 
  .Registration Statement No. 333-61565 on Form S-3.
 
 
                                          ERNST & YOUNG LLP
 
New York, New York
December 3, 1998