IDT (IDT) 10-K 2018 FY Annual report

Exhibit 23.01

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-104286, 333-115403, 333-119190, 333-37141, 333-43501, 333-45199, 333-53719, 333-61565, 333-71991, 333-77395, 333-80133 and 333-86261) and Form S-8 (No. 333-100424, 333-105865, 333-110657, 333-116266, 333-130287, 333-130288, 333-130562, 333-146718, 333-154257, 333-177247, 333-19727, 333-199299, 333-208447, 333-214105, 333-220982, 333-42267, 333-49150, 333-63282, and 333-73167) of IDT Corporation of our reports dated October 15, 2018, relating to the consolidated financial statements, and the effectiveness of IDT Corporation’s internal control over financial reporting, which appear in this Form 10-K.

/s/ BDO USA, LLP

Woodbridge, NJ

October 15, 2018