UNITED STATES
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                  FORM 10-K/A
 
                       FOR ANNUAL AND TRANSITION REPORTS
 
                    PURSUANT TO SECTIONS 13 OR 15(D) OF THE
 
                        SECURITIES EXCHANGE ACT OF 1934
 
[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT
    OF 1934 FOR THE FISCAL YEAR ENDED JULY 31, 1997 OR
 
[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934
 
                        COMMISSION FILE NUMBER: 0-27898
 
                                IDT CORPORATION
                               ------------------
 
             (Exact name of registrant as specified in its charter)
 

                                                         
                          DELAWARE                                                   22-3415036
              (State or other jurisdiction of                           (I.R.S. Employer Identification No.)
              incorporation and organization)

 
                                190 MAIN STREET
 
                          HACKENSACK, NEW JERSEY 07601
          (Address of principal executive offices, including zip code)
 
                                 (201) 928-1000
              (Registrant's telephone number, including area code)
 
        Securities registered pursuant to Section 12(b) of the Act: None
 
 Securities registered pursuant to Section 12(g) of the Act: Common Stock, $.01
                                   par value
                                (Title of class)
 
    Indicate by check mark whether the Registrant: (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
Registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes X No __
 
    Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of Registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]
 
    The aggregate market value of the voting stock held by non-affiliates of the
Registrant, based on the closing price of the Common Stock on December 31, 1997
of $20.25, as reported on the Nasdaq National Market, was approximately $227.7
million. Shares of Common Stock held by each officer and director and by each
person who owns 5% or more of the outstanding Common Stock have been excluded
from this computation in that such persons may be deemed to be affiliates. This
determination of affiliate status is not necessarily a conclusive determination
for other purposes.
 
    As of December 31, 1997 the Registrant had outstanding approximately
12,885,812 shares of Common Stock, $.01 par value, and approximately 10,255,909
shares of Class A Common Stock, $.01 par value.

EXPLANATORY NOTE: Part I, Part II, Part III and the Financial Statements set
forth in Item 14 of Part IV of this Form 10-K have been intentionally omitted
because this Amendment No. 2 does not effect any changes to such items. The
purpose of this filing is to update the Exhibits set forth in Item 14 of Part
IV.

                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.
 
(a) The following documents are filed as part of this Report:
 
1. Financial Statements.
 
2. Financial Statement Schedules.
 


  SCHEDULE NO.                   DESCRIPTION
- -----------------  ---------------------------------------
                
           I.            Valuation and Qualifying Accounts

 
3. Exhibits.
 


  EXHIBIT
    NO.      DESCRIPTION
  --------   --------------------------------------------------------------------------------
          
   3.01(1)   Restated Certificate of Incorporation of the Registrant.
   3.02(1)   By-laws of the Registrant.
   4.01(2)   Specimen Certificates for shares of the Registrant's Common Stock and Class A
               Stock.
   4.02(1)   Description of Capital Stock (contained in the Certificate of Incorporation of
               the Registrant, filed as Exhibit 3.01).
  10.01(3)   Employment Agreement between the Registrant and Howard S. Jonas.
  10.02(3)   Employment Agreement between the Registrant and Howard S. Balter.
  10.03(4)   Amended and Restated 1996 Stock Option and Incentive Plan of IDT Corporation.
  10.04(4)   Form of Stock Option Agreement under the 1996 Stock Option and Incentive Plan.
  10.05(5)   Network Service Provider Agreement between Netscape Communications Corporation
               and the Registrant.
  10.06(2)   Form of Registration Rights Agreement between the Company's Stockholders and the
               Company.
  10.07(1)   Lease of 294 State Street.
  10.08*     Lease of 190 Main Street.
  10.09(6)   Form of Registration Rights Agreement between Howard S. Jonas and the
               Registrant.
  10.10(7)   Employment Agreement between the Registrant and James Courter.
  10.11(5)   Restated Sales Agreement between International Computer Systems, Inc. and the
               Registrant.
  10.12(5)   Restated Consultant and Customer Support Agreement between the Registrant and
               International Computer Systems, Inc.
  10.13(8)   Form of Debenture between the Registrant, RGC International Investors, LDC,
               Pangaea Fund Ltd., Special Situations Private Equity Fund, L.P. and Halifax
               Fund L.P.
  10.14(8)   Securities Purchase Agreement among the Registrant, RGC International Investors,
               LDC, Pangaea Fund Ltd., Special Situations Private Equity Fund, L.P. and
               Halifax Fund L.P.
  10.15(8)   Registration Rights Agreement among the Registrant, RGC International Investors,
               LDC, Pangaea Fund Ltd., Special Situations Private Equity Fund, L.P. and
               Halifax Fund L.P.

 
                                       1



  EXHIBIT
    NO.      DESCRIPTION
  --------   --------------------------------------------------------------------------------
          
  10.16-     Warrants (No. 1 and No. 2) for the Purchase of Common Stock between the
               Registrant and Prime Leasing, Inc.
  10.17-     Stock Purchase Agreement between the Registrant and Mr. David Turock.
  10.18-     Agreement between the Registrant and Mr. Clifford M. Sobel.
  10.19*     Employment Agreement between the Registrant and Mr. David Turock.
  10.20*     Loan and Security Agreement between the Registrant and Transamerica Business
               Credit Corporation.
  10.21*     Revolving Credit Note issued by the Registrant to Transamerica Business Credit
               Corporation.
  10.22*     Security Agreement executed by certain subsidiaries of the Registrant in favor
               of Transamerica Business Credit Corporation.
  10.23*     Guaranty executed by certain subsidiaries of the Registrant in favor of
               Transamerica Business Credit Corporation.
  10.24-     Employment Agreement between the Registrant and Mr. Hal Brecher.
  21.01*     Subsidiaries of the Registrant.
  23.01-     Consent of Ernst & Young LLP.
  27.01-     Financial Data Schedule.

 
- ------------------------
 

        
        *  filed herewith
        -  previously filed
      (1)  incorporated by reference to Form S-1 filed February 21, 1996, file No. 333-00204
      (2)  incorporated by reference to Form S-1 filed March 8, 1996, file No. 333-00204
      (3)  incorporated by reference to Form S-1 filed January 9, 1996, file No. 333-00204
      (4)  incorporated by reference to Form S-8 filed January 14, 1996, file No. 333-19727
      (5)  incorporated by reference to Form 10-K/A for the fiscal year ended July 31, 1996
           filed November 21, 1996
      (6)  incorporated by reference to Form S-1 filed March 14, 1996, file No. 333-00204
      (7)  incorporated by reference to Form S-1 filed December 27, 1996, file No. 333-18901
      (8)  incorporated by reference to Form 8-K filed September 19, 1997

 
(b) Reports on Form 8-K. The Registrant filed one report on Form 8-K during the
    fiscal year ended July 31, 1997, on September 19, 1997, relating to the
    Company's issuance of $7,500,000 aggregate principal amount of convertible
    subordinated debentures.
 
                                       2

                                   SIGNATURES
 
    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this amendment to the
Annual Report on Form 10-K to be signed on its behalf by the undersigned,
thereunto duly authorized.
 
                                IDT CORPORATION
 
                                By:             /s/ HOWARD S. JONAS
                                     -----------------------------------------
                                                  Howard S. Jonas
                                         Chairman, Chief Executive Officer
                                                   and Treasurer
                                Date: February 2, 1998
 
                                       3