CORRESP

4750 Patrick Henry Drive

Santa Clara, CA 95054

April 17, 2012

VIA EDGAR AND E-MAIL

Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E.

Washington, DC 20549

Attention: Mark P. Shuman

Ryan Houseal

Re: Infoblox Inc.

Registration Statement on Form S-1 (Registration No. 333-178925)

Acceleration Request

Requested Date:	April 19, 2012
Requested Time:	4:00 p.m. Eastern Time

Ladies and Gentlemen:

Infoblox Inc. (the “Registrant”) hereby requests that the Securities and Exchange Commission (the “Commission”) take appropriate action to make the above-captioned Registration Statements on Form S-1 effective at the “Requested Date” and “Requested Time” set forth above or as soon thereafter as practicable.

The Registrant hereby authorizes Laird H. Simons III or William L. Hughes, both of whom are attorneys with our legal counsel, Fenwick & West LLP, to orally modify or withdraw this request for acceleration.

The Registrant hereby acknowledges that:

• should the Commission or the staff of the Commission, acting pursuant to delegated authority, declare the filing effective, it does not foreclose the Commission from taking any action with respect to the filing;

• the action of the Commission or the staff, acting pursuant to delegated authority, in declaring the filing effective, does not relieve the Registrant from its full responsibility for the adequacy and accuracy of the disclosure in the filing; and

• the Registrant may not assert the staff comments and the declaration of effectiveness as a defense in any proceeding initiated by the Commission or any person under the federal securities laws of the United States.

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We request that we be notified of such effectiveness by a telephone call to Mr. Simons at (650) 335-7233, or in his absence Mr. Hughes at (415) 875-2479. We also respectfully request that a copy of the written order from the Securities and Exchange Commission verifying the effective time and date of such Registration Statements be sent to Fenwick & West LLP, attention: Laird H. Simons III and William L. Hughes, via facsimile to (650) 938-5200.

Sincerely, INFOBLOX Inc.
By:	/s/ Robert D. Thomas
	Robert D. Thomas Chief Executive Officer

cc: Robert E. Horton, Esq., Infoblox Inc.

Laird H. Simons III, Esq., Fenwick & West LLP

William L. Hughes, Esq., Fenwick & West LLP

[Signature Page to Acceleration Request]

CORRESP

April 17, 2012

Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E.

Washington, D.C. 20549

Re:	Infoblox Inc.
	Registration Statement on Form S-1

Ladies and Gentlemen:

Pursuant to Rule 461 under the Securities Act of 1933, as amended (the “Securities Act”), we, the representative of the underwriters (the “Representative”), hereby join in the request of Infoblox Inc. (the “Registrant”), for the acceleration of the effective date of the Registrant’s Registration Statement on Form S-1 (File No. 333-178925) (the “Registration Statement”), relating to a public offering of shares of the Registrant’s common stock, par value $0.0001 per share, so that the Registration Statement may be declared effective at 4:00 p.m. Eastern Time, on April 19, 2012, or as soon thereafter as practicable. The undersigned, as Representative of the underwriters, confirms that the underwriters are aware of their obligations under the Securities Act.

Additionally, pursuant to Rule 460 of the Securities Act, we hereby advise you that the Preliminary Prospectus dated April 9, 2012, was distributed by the underwriters approximately as follows from April 9, 2012 through the date hereof:

Copies to underwriters	1,209
Copies to dealers	16
Copies to institutional investors	4,731
Copies to others/retail	2,258
Total	8,214

The undersigned, as Representative of the underwriters, hereby represents on behalf of the underwriters that the underwriters are acting in compliance and will act in compliance with the provisions of Rule 15c2-8 promulgated under the Securities Exchange Act of 1934, as amended, in connection with the above proposed offering.

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Very truly yours, Morgan Stanley & Co. LLC Goldman, Sachs & Co. UBS Securities LLC Pacific Crest Securities LLC JMP Securities LLC Stephens Inc.
By: Morgan Stanley & Co. LLC As representative of the several underwriters
By:	/s/ Cynthia Gaylor
Name:	Cynthia Gaylor
Title:	Managing Director

Acceleration Request Signature Page