Exhibit 5.1

Warner Norcross & Judd LLP
Attorneys at Law
900 Fifth Third Center
111 Lyon Street, N.W.
Grand Rapids, Michigan 49503-2487

September 19, 2016

Internap Corporation

One Ravinia Drive, Suite 1300

Atlanta, Georgia 30346

Re: Internap Corporation
Form S-8 Registration Statement

Ladies and Gentlemen:

We have acted as counsel to Internap Corporation ("Internap") in connection with the registration on Form S-8 under the Securities Act of 1933, as amended, of 1,585,000 shares of Internap common stock, $0.001 par value per share (the "Common Stock"), to be issued pursuant to the Restricted Stock Inducement Award Agreement dated as of September 12, 2016 between Internap and Peter D. Aquino (the "Award Agreement").

We are familiar with the proceedings taken by Internap in connection with the authorization of the Common Stock to be issued under the Award Agreement. We have examined such documents, records, and matters of law as we have deemed necessary for purposes of this opinion. In our examination, we have assumed the genuineness of all signatures, the legal capacity of all natural persons, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as copies, and the authenticity of the originals of such copies.

Based upon and subject to the foregoing, we are of the opinion that the Common Stock, when issued in accordance with the Award Agreement, will be validly issued, fully paid, and non-assessable.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement on Form S-8 covering the Common Stock to be issued pursuant to the Award Agreement.

Warner Norcross & Judd LLP

/s/ Charlie Goode

Charlie Goode, a Partner