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Breach occurred 2020-06-21What happened
In 2020, a corpus of data containing almost a quarter of a billion records spanning over 400 different fields was misattributed to database marketing company Acxiom and subsequently circulated within the hacking community. On review, Acxiom concluded that "the claims are indeed false and that the data, which has been readily available across multiple environments, does not come from Acxiom and is in no way the subject of an Acxiom breach". The data contained almost 52M unique email addresses.
Data exposed
Frequently asked questions
The Not Acxiom data breach occurred on June 21, 2020. It was added to Have I Been Pwned's breach catalog on November 22, 2022.
51,730,831 accounts were affected by the Not Acxiom data breach, according to Have I Been Pwned's records.
The Not Acxiom breach exposed the following data types: Email addresses, IP addresses, Names, Phone numbers, Physical addresses.
Have I Been Pwned has not independently verified the Not Acxiom breach. Unverified breaches can still be genuine — verification just means HIBP hasn't been able to confirm the data's authenticity directly, often because the source is a smaller or less-publicized incident.
Use KazaSec's free Email Breach Checker (/tools/breach-check) to check whether a specific email address has surfaced in the Not Acxiom breach, or any other known breach — the tool never stores what you search.
Our free Email Breach Checker tells you whether a specific email address has surfaced in this breach — or any other known breach — without ever storing what you search.
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