Check if your IP address is flagged on major DNS blacklists. Instantly see if your IP is marked for spam or abuse.
IP Blacklist Checker
Enter an IP address to check if it is listed on any major blacklists.
IP Blacklist Checker FAQ – Your Questions Answered
An IP Blacklist Checker is a tool that scans an IP address against various DNS-based blacklists (DNSBLs) to determine if it is flagged for spam, abuse, or malicious activity.
The tool queries a public API endpoint (in this example, the HackerTarget Blacklist API) by appending the IP address. The API returns a plain text report indicating which blacklists, if any, have flagged the IP.
The API checks your IP against multiple DNS-based blacklists (DNSBLs) used to track spam and abuse. The exact list of blacklists may vary based on the API provider.
Yes, this IP Blacklist Checker tool is completely free and leverages public APIs.