Lookup
Run one focused check
Enter a public IP address or domain and get a readable report without creating an account.
Free blacklist tool
Blacklist Reputation Check
Check a domain or IP address against public blacklist sources, then use the report to triage listings, share evidence, or start scheduled monitoring.
Free checks use public blacklist sources. Scheduled monitoring, alerts, and richer source coverage are available after signup.
Built for quick triage
From one lookup to a monitoring decision
A free check should answer the immediate question, then make the next operational step obvious if the host matters to your mail flow.
Triage
Read source-level evidence
See which public sources are clean or listed, plus delisting links when providers publish them.
Monitor
Escalate when it matters
Turn the same host into scheduled monitoring with alerts, history, and shareable reports.
Reputation check FAQ
What to know before you scan
What does the HostRepute reputation check inspect?
It checks an IP address or domain against public blacklist sources and returns a source-level report with the current listing status.
Is the blacklist reputation check free?
Yes. The public reputation check is free for one-off lookups, with a daily fair-use limit for unauthenticated visitors.
What should I do after a listed result?
Review the listed sources, follow any published removal guidance, then move the host into scheduled monitoring so new listings trigger alerts.