Based on our preliminary analysis, the data set appears to be from 2019 or earlier, impacting approximately 7.6 million current AT&T account holders and approximately 65.4 million former account holders.
AT&T said the leaked information varied by customer but included full names, email addresses, mailing addresses, phone numbers, Social Security numbers, dates of birth, AT&T account numbers, and passcodes.
As security researcher Troy Hunt wrote, the data is 'out there in plain sight on a public forum easily accessed by a normal web browser.'
Hunt's post on March 19 said the leaked information included a file with 73,481,539 lines of data that contained 49,102,176 unique email addresses.
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