Skip to content
Back to Blog
critical severity June 21, 2020 · 1 min read

Not Acxiom Data Breach (2020)

If you are a customer of Not Acxiom, here’s what’s now in circulation.

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.

Not Acxiom Data Breach (2020)

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Were you a Not Acxiom customer?
Not Acxiom is one listing. Your email is probably in others.
51.7M accounts were exposed here. Check whether yours is one — and find every other leak tied to the same address, in about 15 seconds. No account, no card.

By running your scan you agree to the Terms and Conditions and the Privacy Policy, and to GalaxyWarden emailing you the results of this scan.

Report details & sourcing

Severity Critical contact details only, none of them permanent
Disclosed June 21, 2020
Last reviewed July 22, 2026
Affected 51.7M
Data exposed Email addressesIP addressesNamesPhone numbersPhysical addresses
By GalaxyWarden Threat Research · Editorial & sourcing standards
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
Sources: Have I Been Pwned
Share this Post on X Reddit Email

Related breaches

critical June 29, 2020

Wattpad — 268 Million Records, and the Passwords Were the Least of It (2020)

Wattpad hashed its passwords with bcrypt, which held up. The problem is the other eleven fields: bio…
high October 03, 2020

Gravatar — 114 Million Email Addresses Recovered From Avatar URLs (2020)

Gravatar identifies you by the MD5 hash of your email address, published in the URL of your avatar o…
critical August 13, 2026

Trezor Shipping Data Breach — 13,689 Hardware Wallet Buyers, Home Addresses Included

ShipMonk, a logistics provider used by Trezor, was breached through a vulnerability in the third-par…