GSMA and Neustar to Work with Twitter for Real-time Mobile Communications Delivery

BARCELONA, Spain, February 15, 2011 - The GSMA and Neustar, Inc., (NYSE: NSR), a leader in providing carriers
and enterprises with solutions for sending calls, messages, and content
across networks worldwide, today announced that they will work with Twitter,
Inc. to ensure subscribers can reliably access their Twitter stream in
real-time - even when they change mobile operators - by using the GSMA
PathFinder Service.

"Neustar is proud to work with the GSMA and Twitter to ensure that people
around the world are able to connect to their social life as it happens,"
said Steve Edwards, senior vice president, Carrier Services at Neustar.
"Twitter is showing tremendous innovation and leadership by using Pathfinder
as part of its reliable infrastructure for its network of users."

Mobile access to Twitter is exploding along with the rapid adoption of
smart phones. Consequently, connecting subscribers seamlessly and reliably to
their individual Twitter account becomes more complex as users switch
operators and geographic regions. PathFinder, a GSMA-managed service operated
by Neustar, is a global registry of IP addresses and phone numbers which
provides global network operators as well as application providers, like
Twitter, with the means to reach all their users irrespective of their choice
of network or technology. Through PathFinder, subscribers can get more
dependable connectivity.

"We are proud to help Twitter route tweets to its extensive community
across network and country boundaries with accuracy and efficiency," said
Adrian Dodd, Senior Director, Managed Services at the GSMA. "We are excited
to see how PathFinder is being harnessed to extend mobile lifestyles, and
working with Twitter demonstrates our ability to support communications
delivered by an expanding range of innovative new businesses."

"We expect rapid growth in the mobile social networking user base to
continue, as well as the amount of time that people spend on such activities
- currently averaging 37 minutes a day," said Nick Holland, Senior Analyst,
Yankee Group. "Consumers expect their services to move with them as they
change network operators or handsets and services such as PathFinder are
critical for enterprises creating brand loyalty through mobile social
networking applications."

About the GSMA

The GSMA represents the interests of the worldwide mobile communications
industry. Spanning 219 countries, the GSMA unites nearly 800 of the world's
mobile operators, as well as more than 200 companies in the broader mobile
ecosystem, including handset makers, software companies, equipment providers,
Internet companies, and media and entertainment organisations. The GSMA is
focused on innovating, incubating and creating new opportunities for its
membership, all with the end goal of driving the growth of the mobile
communications industry.

For more information, please visit Mobile World Live, the new online
portal for the mobile communications industry, at
www.mobileworldlive.com or the GSMA corporate website at
www.gsmworld.com.

About Neustar, Inc.

Neustar, Inc. (NYSE: NSR) provides market-leading, innovative services
that enable trusted communication across networks, applications, and
enterprises around the world. To learn more about Neustar, visit
www.neustar.biz.

GSMA Press Office, Press at gsm.org; or Allen Goldberg of Neustar, Inc., +1-571-434-5520, allen.goldberg at neustar.biz