Free IP Reputation Check
Combine reputation signals for a public IP, including community votes, local rules, and blacklist cache data, to estimate whether an address may be risky.
Common use cases
- Review an IP address before allowlisting, blocking, or escalating an alert.
- Compare reputation with DNSBL blacklist results and IP ownership data.
- Track basic risk signals for public infrastructure you operate.
Frequently asked questions
What contributes to IP reputation?
NerdTools combines available votes, stored rules, and blacklist cache signals into a practical reputation result.
Should I block an IP only from this result?
Use the result as one signal. Confirm with logs, business context, and your organization’s security policies before taking action.