FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   CINCINNATI BELL INC 2. Date of Event Requiring Statement (Month/Day/Year) 01/17/2013 3. Issuer Name and Ticker or Trading Symbol CyrusOne Inc. [CONE] (Last) (First) (Middle) 221 EAST FOURTH STREET 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) CINCINNATI, OH 45202 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 100 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Operating Partnership Units (1)	  (1)	  (2)	Common Stock	123,688,587 (3)	$ (1)	I	See Footnote (4)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CINCINNATI BELL INC 221 EAST FOURTH STREET CINCINNATI, OH 45202	Â	  X	Â	Â

Signatures

/s/ Christopher J. Wilson, Vice President, General Counsel and Secretary		01/17/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	"Operating Partnership Units" are the common units of limited partnership interest in the Issuer's operating partnership, CyrusOne LP, a Maryland limited partnership (the "Operating Partnership"). Operating Partnership Units will be redeemable beginning 12 months from the consummation of the Issuer's initial public offering for cash equal to the then current market value of one share of the Issuer's common stock, or at the election of the Issuer, for shares of the Issuer's common stock on a one-for-one basis.
(2)	The right to convert Operating Partnership Units into shares of common stock has no expiration date.
(3)	Does not reflect the approximately 2.8-to-1 unit reverse split expected to be effected immediately prior to the consummation of the Issuer's initial public offering.
(4)	Data Center Investments Holdco LLC and Data Centers South Holdings LLC are the record holders of 55,038,337 and 68,650,250 Operating Partnership Units, respectively (collectively, the "Controlled OP Units"). Cincinnati Bell Inc. is the sole stockholder of Cincinnati Bell Technology Solutions Inc., which is the sole stockholder of Data Center Investments Inc., which is the sole member of Data Center Investments Holdco LLC. Data Center Investments Inc. is also the sole stockholder of Data Centers South Inc., which is the sole member of Data Centers South Holdings LLC. As a result, Cincinnati Bell Inc. exercises investment discretion and control over the Controlled OP Units.

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