T-Mobile is investigating an online forum post claiming to be selling a trove of customer sensitive data. Online magazine and video channel Motherboard reported that it was in contact with the seller of the data, who claimed to have stolen data from T-Mobile’s servers that included Social Security numbers, names, addresses, and driver license information related to more than 100 million people. Having reviewed the data, Motherboard reported that it appeared authentic. “We are aware of claims made in an underground forum and have been actively investigating their validity,” a T-Mobile spokesperson stated. “We do not have any additional information to share at this time.” T-Mobile has been the target of several data breaches in the last few years, most recently in December 2020 when call-related information and phone numbers for some of its customers may have been exposed.