Global information services group Experian announced Thursday that one of its business units had been hacked. The breach occurred on a server that contained data on behalf of one of its clients, T-Mobile.
The data includes personal information for a combination of about 15 million customers and credit applicants in the U.S. The company said that the incident did not impact its own consumer credit database.
The data stolen included names, dates of birth, addresses and Social Security numbers. No payment card or banking information was acquired, the company said.
This article originally appeared on Recode.net.