458.0M records in December 2016. Check whether your email is in this file — then read what was taken and what to do.
458.0M
Records exposed
2016
Year
2
Data types
Free
To check
Quick answer — was Anti Public Combo List breached?
Yes. Anti Public Combo List was breached in December 2016, exposing 457,962,538 records including email addresses, passwords. If your email was involved, your data may still be at risk today. Check if you were affected.
What happened in the Anti Public Combo List data breach?
In December 2016, a huge list of email address and password pairs appeared in a "combo list" referred to as "Anti Public". The list contained 458 million unique email addresses, many with multiple different passwords hacked from various online systems. The list was broadly circulated and used for "credential stuffing", that is attackers employ it in an attempt to identify other online systems where the account owner had reused their password. For detailed background on this incident, read Password reuse, credential stuffing and another billion records in industry-standard breach data sources.
The exposed data included 2 types of personal information. Because passwords were exposed, users who reused their password on other sites are at particular risk. Learn more about what a data breach means for you.
Why was the Anti Public Combo List breach so dangerous?
The Anti Public Combo List breach exposed 457,962,538 records — 458.0M people whose personal data is now circulating in criminal markets.
Because passwords were exposed, attackers can use credential stuffing to automatically test your Anti Public Combo List credentials against hundreds of other websites. Read more about what happens to your data after a breach.
If you used Anti Public Combo List, check whether your email was exposed in this breach.
What data was stolen in the Anti Public Combo List breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Passwords — can be used to access your accounts directly or cracked to reveal your actual password
Is the Anti Public Combo List breach still dangerous in 2026?
Yes. Stolen data from the Anti Public Combo List breach remains dangerous years after the incident. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2016 are still actively used in automated attacks today.
Personal information like email addresses, phone numbers, and dates of birth does not expire. Even if you changed your Anti Public Combo List password, the other exposed data can be combined with information from other breaches to target you. Learn how long stolen data stays dangerous.
What to do if your email was in the Anti Public Combo List breach
1
Change your Anti Public Combo List password immediately
Log into Anti Public Combo List and change your password to something strong and unique — one you have never used anywhere else. A password manager after a breach can generate and store a unique password so you never reuse one.
2
Change any account sharing that password
If you reused this password elsewhere, walk the password-reuse change checklist. You can also check whether that password appears in known leaks without sending the password itself.
3
Enable two-factor authentication
Turn on 2FA or a passkey after a breach on Anti Public Combo List and every important account. Even if your password is known, attackers cannot sign in without the second factor.
4
Check your other accounts for this breach
Run a full email scan to see every breach your address appears in — not just this one. Then follow the after-breach playbook. If a password from this incident is still in use, check it without sending the password itself.
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Shrink people-search listings if your name or address was exposed
A leaked email plus a public people-search page makes phishing more convincing. That is a separate job from changing passwords. See the data broker opt-out guide for official forms and, if you want help, removal services.
Frequently asked about the Anti Public Combo List breach
How many people were affected by the Anti Public Combo List data breach?
Approximately 457,962,538 user records were exposed in the Anti Public Combo List breach in December 2016.
Is the Anti Public Combo List breach still a risk in 2026?
Yes. Leaked credentials are actively used in credential-stuffing attacks years after a breach. If you reused your Anti Public Combo List password elsewhere and have not changed it, those accounts remain at risk today.
How do I check if my email was in the Anti Public Combo List breach?
Enter your email in the free checker on EmailLeaked. We scan millions of breach records including the Anti Public Combo List dataset and tell you instantly whether your email was exposed and what data was taken.
What should I do if I was in the Anti Public Combo List breach?
Change your Anti Public Combo List password immediately, update any account where you used the same password, and enable two-factor authentication on all important accounts. Use a unique password for every account — a password manager makes this straightforward — and monitor for phishing emails over the next 90 days.
How this breach page is reviewed
Breach pages are built from structured breach records and reviewed for practical risk guidance by EmailLeaked. Risk labels reflect exposed data types and are intended to help readers prioritise action.
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