Blacklist Lookup
Enter a URL
What Is a Blacklist Lookup?
A blacklist lookup checks whether a domain or IP address has been flagged on any major spam or malware blacklists (DNSBLs) — being listed can cause your emails to be rejected or your site to be flagged as unsafe by browsers and security tools.
How to Use the Blacklist Lookup
- Enter your domain or IP address
- Click Check
- Review the results across multiple blacklist databases
- Follow each listing service's delisting process if flagged
Key Features
- Checks multiple blacklists at once — saves checking each one manually
- Clear listed/not-listed status per source
Who Uses This Tool
Email administrators diagnosing deliverability problems. Site owners investigating why their domain might be flagged as unsafe.
Frequently Asked Questions
What should I do if I'm blacklisted?
Identify and fix the underlying cause (compromised server, spam-sending script, etc.), then follow the specific blacklist's delisting request process — each one handles removal differently.
Is this tool free?
Yes, checking blacklist status is completely free.
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