Exhibit 10.1.4

Pursuant to Instruction 2 to Item 601 of Regulation S-K, NeuStar, Inc. has filed an agreement with the North American Portability Management LLC, as successor to Northeast Carrier Acquisition Company, LLC, which is one of seven agreements that are substantially identical in all material respects other than the parties to the agreements. North American Portability Management, LLC succeeded to the interests of Northeast Carrier Acquisition Company, LLC and each of the other entities listed below. The following list identifies the other parties to the six agreements that have been omitted pursuant to Instruction 2 to Item 601:

Amendment No. 75 (NE)
SOW: o    No
            þ    Yes

STATEMENT OF WORK NO. 75

UNDER

CONTRACTOR SERVICES AGREEMENT

FOR

NUMBER PORTABILITY ADMINISTRATION CENTER / SERVICE
MANAGEMENT SYSTEM

ELIMINATION OF DIAL-UP PORT TO NPAC NETWORK

Page 1

CONFIDENTIAL

Amendment No. 75 (NE)
SOW: o    No
           þ    Yes

STATEMENT OF WORK NO. 75

UNDER

CONTRACTOR SERVICES AGREEMENT
FOR
NUMBER PORTABILITY ADMINISTRATION CENTER/SERVICE MANAGEMENT
SYSTEM

Elimination of Dial-up Port to NPAC Network

1. PARTIES

This Statement of Work No. 75 (this “Statement of Work” or “SOW” ) is entered into pursuant to Article 13 and Article 30, and upon execution shall be a part of, the Contractor Services Agreements for Number Portability Administration Center/Service Management System, as amended and in effect immediately prior to the SOW Effective Date (each such agreement referred to individually as the “Master Agreement” and collectively as the “Master Agreements” ), by and between NeuStar, Inc., a Delaware corporation (“Contractor” ), and the North American Portability Management LLC, a Delaware limited liability company (the “Customer” ), as the successor in interest to and on behalf of the Northeast Carrier Acquisition Company, LLC (the “Subscribing Customer” ).

2. EFFECTIVENESS AND SUBSCRIBING CUSTOMERS

This Statement of Work shall be effective as of the last date of execution below (the “SOW Effective Date” ), conditioned upon execution by Contractor and Customer on behalf of all the limited liability companies listed below for the separate United States Service Areas (the “Subscribing Customers” ).