X0303 4 2010-02-23 0 0001265888 NEUSTAR INC NSR 0001438991 Arnold Douglas 46000 CENTER OAK PLAZA STERLING VA 20166 0 1 0 0 SVP Restricted Stock 2010-02-23 4 A 0 5980 0.00 A 9980 D Performance Share Units 0.00 2010-02-23 4 A 0 5980 0.00 A 2013-01-01 Class A Common Stock 5980 D Employee Stock Options 22.82 2010-02-23 4 A 0 35420 0.00 A 2017-02-23 Class A Common Stock 35420 35420 D The shares acquired were awarded pursuant to a restricted stock agreement under the NeuStar, Inc. 2009 Stock Incentive Plan. Twenty-five percent of the shares vest on each of February 23, 2011, 2012, 2013 and 2014. Includes shares that are subject to restricted stock agreements under the NeuStar, Inc. 2005 Stock Incentive Plan and the NeuStar, Inc. 2009 Stock Incentive Plan. The performance share units terminate if the Reporting Person experiences a Termination (as defined in the NeuStar, Inc. 2009 Stock Incentive Plan) before January 1, 2013. Upon vesting, the Reporting Person will be entitled to receive shares of Class A Common Stock, the amount of which is based on, and subject to, the achievement of certain revenue and EBITDA goals set forth in the Performance Award Agreement. The number of shares of Class A Common Stock, together with Dividend Equivalents (as defined in the NeuStar, Inc. 2009 Stock Incentive Plan) on such performance share units, that the Reporting Person will be entitled to receive will range from 0% to 150% of the number of shares of performance share units granted. Twenty-five percent of the options vest on February 23, 2011, after which the remaining options vest in thirty-six monthly installments. /s/ Martin K. Lowen, by power of attorney 2010-02-25