AT&T confirms that data dumped online appears to be from 2019 or earlier and contains personal data of 7.6M current and 65.4M former account holders (Zack Whittaker/TechCrunch)
https://techcrunch.com/2024/03/30/att-reset-account-passcodes-customer-data/
http://www.techmeme.com/240330/p9#a240330p9