Whether you are a current subscriber or had an AT&T account in the past, your personal data could be part of a massive breach that according to a note from AT&T to customers impacts up to 73 million account holders (via WP).
The 7.6 million current subscribers involved in the breach have had their passcodes reset and should have received communication from AT&T already notifying them of the breach. The stolen data is all from 2019 or earlier and also includes 65.4 million former account holders. While according to AT&T there is no financial or call history information, it may include full names, email addresses, mailing addresses, Social Security numbers, date of birth, AT&T account numbers and passcodes.
