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Blacklist Checker
Check whether your domain or IP address is listed on email spam blacklists. Free to use, private and fast – it works on any phone or computer with no sign-up.
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Make Sure Your Emails Are Not Flagged as Spam
Check whether your domain or IP address is listed on email spam blacklists. Blacklists (DNSBLs) record IPs and domains that send spam. Being listed can send your emails to spam folders, so regular checks protect deliverability.
How to Use Our Blacklist Checker?
Using the Blacklist Checker is quick and simple. Follow these 4 easy steps:
Step 1Enter the domain or ip
Enter your domain name or server IP address.
Step 2Fetching live data
Press Check to scan popular spam blacklists.
Step 3Your report
See which lists, if any, include your IP or domain.
Step 4Fix email deliverability
Copy, download or share your report.
How Does Our Blacklist Checker Work?
As soon as you add your domain or IP, the Blacklist Checker processes it instantly and shows your report on the same page. There is nothing to install and no account to create, and the data you enter is used only to show your result.
What Can You Do With the Blacklist Checker?
The free Blacklist Checker from PDF SEO Tools is a handy online utility. Here are the most common ways people use it:
- Fixing email deliverability
- Checking new server IPs
- Monitoring reputation
- Investigating spam complaints
- Real-time lookup
- Clear report
- Helpful for SEO
- Fast
Why Use Our Free Blacklist Checker?
From free access to quick results, the Blacklist Checker offers several advantages. Here are some of them:
Real-time lookup
Data is fetched live when you run the check.
Clear report
Results are displayed in a simple, readable layout.
Helpful for SEO
Understand domains, hosting and IPs before buying or linking.
Free, No Sign-Up
Use the Blacklist Checker without an account or payment.
How Can Our Free Blacklist Checker Help You?
The Blacklist Checker from PDF SEO Tools can help you in a variety of ways:
Real-time lookup
Data is fetched live when you run the check.
Clear report
Results are displayed in a simple, readable layout.
Free domain research
Use the Blacklist Checker without registration.
Helpful for SEO
Understand domains, hosting and IPs before buying or linking.
Explore Other Free Tools
Frequently Asked Questions
What if I am blacklisted?
Fix the cause, then request removal from the list. Common causes are a hacked contact form, a compromised email account or a spam script on the server. Fix the cause first, then follow each list's removal process.
Where does the Blacklist Checker get its data?
It queries public internet sources in real time, such as DNS servers, WHOIS records and IP registries. Results reflect what those services report at the moment you run the check.
Why might the result differ from another tool?
DNS changes can take time to spread across the internet, and some services cache older data. If a result looks outdated, wait a little and run the check again.
Is the Blacklist Checker safe and private?
Yes. Everything travels over a secure HTTPS connection, and the data you enter is used only to show your result – it is never published or sold. You do not need an account, and the tool works the same way on phones, tablets and computers.
Is the Blacklist Checker free to use?
Yes. The Blacklist Checker on pdfseotools.com is free to use – no sign-up, no watermark and no hidden charges for everyday tasks.
Do I need to install software or create an account?
No. Everything runs in your web browser on Windows, Mac, Android and iPhone – there is nothing to download, nothing to install and no account to create.
Start Using the Blacklist Checker
Ready to try it? Scroll up to the Blacklist Checker, enter your domain name or server IP address and see the result in seconds. Bookmark PDF SEO Tools to keep 150+ free tools for PDFs, images, text, SEO and development one tap away.
Something not working, or missing a feature you need? Tell our support team – we read every message.
