Domain Blacklist Checker
Check if a domain is blacklisted by major spam databases.
How to Use Domain Blacklist Checker
Enter your domain name (e.g., example.com) in the search box.
Click the 'Check Blacklists' button.
We will query major DNS-based Blackhole Lists (DNSBL) and spam databases to see if your domain is flagged.
Why Use This Tool?
Email Deliverability
If your domain is on a spam blacklist, your emails will automatically bounce or go straight to your customers' junk folders.
SEO Penalties
Search engines like Google penalize and de-index domains that are flagged for malware or phishing.
Buy with Confidence
Always check if a domain is blacklisted before purchasing it to ensure you aren't inheriting a ruined reputation.
Understanding Your Results
Spamhaus ZEN
The industry standard spam blocklist. Being listed here will severely impact your email deliverability.
Barracuda BRBL
A massive security database used by thousands of enterprise firewalls and spam filters.
False Positives
If you are on a shared hosting IP address, the IP itself might be blacklisted by the actions of another user.
Important Notes
- Results are provided for informational purposes only.
- External API limits may apply to this tool.
- Do not use this tool for malicious scanning or targeting.
Privacy & Security
- Requests are processed securely. We do not store your scan history.
- We do not collect personal information from tool inputs.
Need reliable hosting for your projects?
Join thousands of developers and businesses using HOSTINGONE's high-performance infrastructure.