Enter IP Address Below to check if its blacklisted. We check over 110+ blacklists to identify if the entered IP is included in any of them. The tool will give also a Risk Rating for each IP (with values 0, -1, -2, -3) as described below.
Description of Blacklist Tool
The tool above checks each IP address against 110+ blacklists to access its risk level and gives a score between -3 and 0 (more on that later).
The tool makes use of an external API provided by Auth0 authentication and security company.
The Auth0 blacklist API offers an up-to-date IP reputation data which is derived and collected from Open-Source Intelligence (OSINT) from around the Internet.
The API performs three main checks for each IP address entered as following:
- Check if the IP address itself is listed in any one of the 110+ blacklists.
- Check if the hostname (reverse DNS) of the IP is listed in any of the supported blacklists.
- Check if the IP address was included in any blacklists in the past one year (reputation history of the IP).
If none of the checks above is successful (i.e the IP or hostname are not listed in any blacklists, either now or during the past year), the Risk Rating Score is 0.
If any of the checks above is successful, then -1 is subtracted from the reputation score, with a maximum value of -3.
For example, if the IP address is not currently listed in any blacklists but has been blacklisted during the past one year (reputation history check), the Risk Rating of the IP becomes -1.
If all checks above are valid, the Risk Rating becomes -3 (which is the Highest Risk reputation for the IP).
To summarize, the Risk Rating Score has the following meaning:
Risk Rating Meaning
0 = IP Address is Safe
-1 = IP Address has Lower Risk
-2 = IP Address has Medium Risk
-3 = IP Address has the Highest Risk