August 11, 1999


Board of Directors
IDT, Inc.
2275 Swallow Hill Road
Building 2500, 2nd Floor
Pittsburgh, PA 15220


Gentlemen:

We have examined the corporate records and proceedings of IDT, Inc., a
Pennsylvania corporation (the "Company"), with respect to:

     1.   The organization of the Company;

     2.   The legal sufficiency of all corporate proceedings of the Company
          taken in connection with the creation, issuance, the form and
          validity, and full payment and non-assessability, of all the currently
          outstanding and issued common stock of the Company; and

     3.   The legal sufficiency of all corporate proceedings of the Company,
          taken in connection with the creation, issuance, the form and
          validity, and full payment and non-assessability, when issued, of
          shares of the Company's common stock (the "Shares"), to be issued by
          the Company covered by the registration statement (hereinafter
          referred to as the "Registration Statement") filed with the Securities
          and Exchange Commission on August 16, 1999, file number 33-


                                      EXHIBIT 5.1



Board of Directors
Page 2
August 11, 1999


          _______ (in connection with which Registration Statement this opinion
          is rendered).

We have also examined such other documents and such questions of law as we have
deemed to be necessary and appropriate, and on the basis of such examinations,
we are of the opinion:

     (a)  That the Company is duly organized and validly existing under the laws
of the Commonwealth of Pennsylvania;

     (b)  That the Company is authorized to issue 80,000,000 shares of common
stock of which 10,087,500 shares of common stock were outstanding as of 1999.

     (c)  That the Company has taken all necessary and required corporate
proceedings in connection with the creation and issuance of the presently issued
and outstanding shares of common stock and that all such stock so issued and
outstanding has been validly issued, is fully paid and non-assessable, and is in
proper form and valid;

     (d)  That when the Registration Statement shall have been declared
effective by order of the Securities and Exchange Commission, after a request
for acceleration by the Company, and the Shares shall have been issued and sold
upon the terms and conditions set forth in the Registration Statement, then the
Shares will be validly authorized and legally issued, fully paid and
non-assessable.



Board of Directors
Page 3
August 11, 1999


We hereby consent (1) to be named in the Registration Statement, and in the
Prospectus which constitutes a part thereof, as the attorneys who will pass upon
legal matters in connection with the sale of the Shares, and (2) to the filing
of this opinion as an exhibit to the Registration Statement.

Sincerely,



Meyer, Unkovic & Scott, LLP