X0202 4 2006-07-03 0 0001265888 NEUSTAR INC NSR 0001325971 LOWEN MARTIN 46000 CENTER OAK PLAZA STERLING VA 20166 0 1 0 0 Sr. VP, Gen. Counsel and Sec. Class A Common Stock 2006-07-03 4 M 0 23315 4.286 A 56515 D Class A Common Stock 2006-07-03 4 M 0 2485 6.429 A 59000 D Class A Common Stock 2006-07-03 4 S 0 400 31.45 D 58600 D Class A Common Stock 2006-07-03 4 S 0 100 31.46 D 58500 D Class A Common Stock 2006-07-03 4 S 0 300 31.49 D 58200 D Class A Common Stock 2006-07-03 4 S 0 100 31.50 D 58100 D Class A Common Stock 2006-07-03 4 S 0 600 31.51 D 57500 D Class A Common Stock 2006-07-03 4 S 0 400 31.52 D 57100 D Class A Common Stock 2006-07-03 4 S 0 100 31.54 D 57000 D Class A Common Stock 2006-07-03 4 S 0 200 31.55 D 56800 D Class A Common Stock 2006-07-03 4 S 0 100 31.56 D 56700 D Class A Common Stock 2006-07-03 4 S 0 300 31.59 D 56400 D Class A Common Stock 2006-07-03 4 S 0 100 31.61 D 56300 D Class A Common Stock 2006-07-03 4 S 0 300 31.62 D 56000 D Class A Common Stock 2006-07-03 4 S 0 400 31.63 D 55600 D Class A Common Stock 2006-07-03 4 S 0 400 31.65 D 55200 D Class A Common Stock 2006-07-03 4 S 0 400 31.66 D 54800 D Class A Common Stock 2006-07-03 4 S 0 100 31.67 D 54700 D Class A Common Stock 2006-07-03 4 S 0 200 31.68 D 54500 D Class A Common Stock 2006-07-03 4 S 0 200 31.69 D 54300 D Class A Common Stock 2006-07-03 4 S 0 100 31.70 D 54200 D Class A Common Stock 2006-07-03 4 S 0 500 31.71 D 53700 D Class A Common Stock 2006-07-03 4 S 0 300 31.72 D 53400 D Class A Common Stock 2006-07-03 4 S 0 300 31.73 D 53100 D Class A Common Stock 2006-07-03 4 S 0 400 31.74 D 52700 D Class A Common Stock 2006-07-03 4 S 0 600 31.75 D 52100 D Class A Common Stock 2006-07-03 4 S 0 700 31.76 D 51400 D Class A Common Stock 2006-07-03 4 S 0 100 31.77 D 51300 D Class A Common Stock 2006-07-03 4 S 0 900 31.78 D 50400 D Class A Common Stock 2006-07-03 4 S 0 300 31.79 D 50100 D Employee Stock Option 4.286 2006-07-03 4 M 0 23315 0.00 D 2013-06-26 Class A Common Stock 23315 36879 D Employee Stock Option 6.429 2006-07-03 4 M 0 2485 0.00 D 2013-12-18 Class A Common Stock 2485 45158 D Includes 1,700 shares that are subject to a restricted stock agreement under the NeuStar, Inc. 2005 Stock Incentive Plan, which provides that twenty-five percent of the shares vest on each of February 22, 2007, 2008, 2009 and 2010. Immediately. 10,159 options are immediately exercisable with the remaining options vesting in monthly installments through December 2008. Form 4 Filing 1 of 3 (continuation report): Related transactions effected by the Reporting Person on July 3, 2006 are reported on additional Forms 4. *** All of the sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.*** /s/ Martin Lowen 2006-07-06