AT&T has experienced a massive personal data breach, so if you’re one of the more than 100 million people who use the company, you’ll want to be on guard.

According to a new report from Hack Read, more than 86 million customers have been affected with leaked details ranging from full names to dates of birth, phone numbers, email addresses and physical addresses.

It’s reported that more than 44 million Social Security Numbers were also included in the data leak.

While each of these data sets poses privacy risks on their own, together they could create full identity profiles that could be exploited for fraud or identity theft.

The stolen data is reportedly fully decrypted and was first posted to a Russian cybercrime forum on May 15 before being re-uploaded on the same forum on June 3.