Until the end of 2018, Neustar was also a North American Numbering Plan Administrator under behalf of the Federal Communications Commission, a role continued from its founder, Lockheed Martin.

In January 2010, The Washington Post reported that under Hook's leadership, Neustar was chosen by a consortium of Hollywood studios and technology executives to manage a system whereby consumers could access movies and other video entertainment from multiple digital devices.

[11] Neustar lost its Number Portability Administration Center (NPAC) contract in 2016 to Ericsson subsidiary Telcordia.

The local-number-portability administrator (LNPA) was created to handle NPAC, which enables users to take their phone numbers with them when they switch service providers.

[14] Three months later, Neustar bought TRUSTID, a caller authentication and fraud prevention systems provider for contact centers.

Neustar previously operated the authoritative directory for U.S. Common Short Codes, part of the short messaging service (SMS) relied upon by the U.S. wireless industry, and provides solutions used by mobile network operators to enable mobile instant messaging for their end users.

CTIA granted that contract to Iconectiv, who took over providing Common Short Code (CSC) Registry Services on January 1, 2016.