Attached files

file filename
EX-31.2 - EXHIBIT 31.2 - GTT Communications, Inc.ex-312.htm
EX-32.2 - EXHIBIT 32.2 - GTT Communications, Inc.ex-322.htm
EX-32.1 - EXHIBIT 32.1 - GTT Communications, Inc.ex-321.htm
EX-31.1 - EXHIBIT 31.1 - GTT Communications, Inc.ex-311.htm
EX-21.1 - EXHIBIT 21.1 - GTT Communications, Inc.ex-211.htm
10-K - 10-K - GTT Communications, Inc.gtt-2016123110k.htm
Exhibit 23.1



CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-194972) and Form S-8 (Nos. 333-210488, 333-210095, 333-194530, and 333-139356) of our reports dated March 8, 2017, with respect to the consolidated financial statements and schedule of GTT Communications, Inc. as of December 31, 2016 and 2015 and for each of the three years in the period ended December 31, 2016 and the effectiveness of internal control over financial reporting of GTT Communications, Inc. as of December 31, 2016 included in this Annual Report  on Form 10-K for the year ended December 31, 2016.

/s/ CohnReznick LLP
March 8, 2017
Tysons, Virginia