EX-99.1

                                                                   Schedule 99.1
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Explanation of Responses
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(1)  This Form 3 pertains to the simultaneous execution and effectiveness of
     NeuStar, Inc.'s Registration Statement on Form S-1, filed with the
     Securities and Exchange Commission on March 29, 2005, as amended.

(2)  The stockholders are Warburg, Pincus Equity Partners, L.P., a Delaware
     limited partnership, including two affiliated partnerships ("WPEP").
     Warburg Pincus Partners LLC, a New York limited liability company ("WP
     Partners"), which is a subsidiary of Warburg Pincus & Co., a New York
     general partnership ("WP") is the sole general partner of WPEP. Warburg
     Pincus LLC, a New York limited liability company, ("WP LLC," and together
     with WPEP, WP Partners and WP, the "Warburg Entities") manages WPEP. By
     reason of the provisions of Rule 16a-1 of the Securities Exchange Act of
     1934, as amended, the Warburg Entities may be deemed to be the beneficial
     owners of the shares of Class A Common Stock. Each of WP Partners, WP LLC
     and WP disclaims beneficial ownership of all shares of Class A Common Stock
     owned by WPEP, except to the extent of any indirect pecuniary interest
     therein. The address of each Warburg Entity is 466 Lexington Avenue, New
     York, NY 10017.

EX-99.2

                                                                    Exhibit 99.2
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Additional Filers
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Designated Filer:                   Warburg Pincus Equity Partners, L.P.
Issuer & Ticker Symbol:             NeuStar, Inc. (NSR)
Date of Event Requiring Statement:  June 28, 2005

1. Name:    Warburg, Pincus Equity Partners, L.P.
   Address: 466 Lexington Avenue
            New York, New York  10017

2. Name:    Warburg Pincus Partners, LLC
   Address: 466 Lexington Avenue
            New York, New York  10017

3. Name:    Warburg Pincus & Co.
   Address: 466 Lexington Avenue
            New York, New York  10017

4. Name:    Warburg Pincus LLC (Manager of WPEP)
   Address: 466 Lexington Avenue
            New York, New York  10017





                    WARBURG PINCUS PARTNERS, LLC

                    By:  Warburg Pincus & Co.,
                         Managing Member

                    By:  /s/ Scott A. Arenare                6/28/05
                        ------------------------------    ----------------------
                        Name:  Scott A. Arenare              Date
                        Title:  Partner


                    WARBURG PINCUS & CO.

                    By:  /s/ Scott A. Arenare                6/28/05
                        ------------------------------    ----------------------
                        Name:  Scott A. Arenare              Date
                        Title:  Partner


                    WARBURG PINCUS LLC

                    By:  /s/ Scott A. Arenare                6/28/05
                        ------------------------------    ----------------------
                        Name:  Scott A. Arenare              Date
                        Title:  Partner