Blacklist Lookup Tool
Check if your IP address or hostname is listed on major blacklists
Blacklist Checker
Enter an IP address or hostname to check against major blacklists
Blacklist Information
Understanding blacklist categories and their purposes
About Blacklists
Blacklists are databases of IP addresses and domains known for malicious activity. Understanding what each blacklist checks helps interpret your results:
📧 Email Spam & IP Abuse
Lists targeting spam sources, compromised hosts, and IPs that shouldn't send email directly. Important for email delivery reputation.
🛡️ Botnet, Malware & Malicious Activity
Lists tracking infected computers, botnet members, and IPs involved in attacks or scanning activities.
Note: Being listed doesn't always indicate malicious intent - dynamic IPs, shared hosting, or policy violations can also result in listings.