Blacklist Check
Query dozens of DNS blacklists (RBLs) to see whether an IP or domain is currently listed.
Enter a value above and run the check to see results here.
How it works
Query dozens of DNS blacklists (RBLs) to see whether an IP or domain is currently listed.
Frequently asked questions
Is the Blacklist Check tool free to use?+
Yes. The Blacklist Check runs directly in NetInsight with no signup required. Free-tier usage is rate limited to keep the service fast for everyone.
Are my queries logged?+
Diagnostic inputs are processed to produce your result and are not sold or shared. See our Privacy Policy for full detail on retention.
How accurate are the Blacklist Check results?+
Results are fetched live from authoritative sources each time you run a check, so they reflect the current state rather than a cached snapshot.