Blacklist Lookup

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About Blacklist Lookup

The Blacklist Lookup tool is a free online tool used to check if an IP address or domain is listed on a DNS-based blacklist. It is a helpful tool for email administrators and website owners who want to verify if their IP address or domain is blacklisted. The Blacklist Lookup tool queries the major DNS blacklists such as Sorbs, Spamhaus, NJABL, DSBL, CBL and PSBL, and returns whether the IP address or domain is listed or not. The tool is free and easy to use. Simply enter the IP address or domain name and the tool will search the blacklist databases and report the results.