IDT CORPORATION

SPECIFIC POWER OF ATTORNEY

For the Purpose of Filing Forms 3, 4, 5 and 144 with the Securities and Exchange Commission


I, Yona Katz, an Executive Officer of IDT Corporation, a Delaware corporation, do
hereby constitute and appoint Joyce J. Mason and Stephanie Greene, or any one of them, my true
and lawful attorney and agent in fact for me and in my name, place and stead, and for my use and
benefit:
To sign and file with the Securities and Exchange Commission any and all
Form 3, Form 4, Form 5 or Form 144 filings regarding the purchase or sale of IDT Corporation
non-derivative securities and/or the grant, exercise or cancellation of IDT Corporation derivative
securities ("Securities") undertaken by me during any calendar month for which I am unable to
sign and file personally.
This instrument is to be construed and interpreted as a specific and not a general
power of attorney.  The enumeration of specific items, acts, rights or powers herein limits and
restricts, and is to be construed or interpreted as limiting or restricting the specific powers herein
granted to said attorney in fact.
The rights, powers and authority of said attorney in fact to exercise the specific
rights and powers herein granted shall commence and be in full force and effect on January 30,
2006, and such rights, powers and authority shall remain in full force and effect thereafter until
the earlier of December 31, 2010 or until the requirement to file such Forms 3, 4, 5 or 144 with
the Securities and Exchange Commission regarding IDT Corporation Securities no longer
applies to me.
Dated:	January 26, 2006


By:	/s/ Yona Katz
	Yona Katz