UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

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Internap Network Services Corporation

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

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June 1, 2011

Dear Stockholder,

We recently mailed proxy materials to you for the Annual Meeting of Stockholders to be held on June 16, 2011, and according to our records, your vote has not been received.

The Board of Directors unanimously recommends that stockholders vote “FOR” the proposals as set forth in the proxy statement that was previously sent.

Your vote is extremely important and your shares cannot be voted on proposal 1, 2, 4, and 5 unless you give your specific instructions.  Please vote today by using the toll free telephone voting service or the internet.  Voting instructions are located on the enclosed proxy card.  You may also vote by signing, dating and returning the proxy card in the envelope provided.

If you have any questions regarding voting, you may call our proxy solicitor, Morrow & Co., LLC, toll free at (800) 662-5200.

Sincerely,

Internap Network Services Corporation

J. Eric Cooney

Chief Executive Officer and President