Free Tools · Security

Blacklist Checker

Check an IP address against 32 major email blacklists in real time. Any listings show up first, so problems are easy to spot.

Enter an IP address to scan

https://

✓ 32 live blacklists ✓ Real-time DNS checks ✓ Results in seconds

What the blacklist scan checks

32 blacklists
Major lists like Spamhaus, Barracuda and SpamCop, each checked live.
Reputation grade
An overall grade for the IP, based on how many lists flag it.
Listings first
Any list that flags the IP moves to the top, so you know where to start.

Straight answers about your results.

What is an email blacklist?

A blacklist is a public list of IP addresses known to send spam. Mail servers check these lists and may block or junk mail from a listed IP.

How did my IP get listed?

Common causes are a hacked site sending spam, a bad neighbor on a shared IP, or a sudden spike in email. Fix the cause before you ask to be removed.

How do I get delisted?

Fix the cause first, then follow each list’s removal steps. Many lists drop an IP on their own once the spam stops.

Is the blacklist scan free?

Yes. It’s free and there’s nothing to sign up for.

Quick checks you can run any time. No signup.

We find the cause, clean it up and work with each list to get you removed.