Free tools
Queries the Spamhaus Domain Block List (DBL), a public list that includes domains reported for spam, phishing and malware distribution, giving a quick signal about a domain.
A domain not appearing on this list does not guarantee it is safe, and appearing on it does not always mean it is active as a threat today. It is one more public signal for your own judgment.
It is one of the most widely used domain lists by anti-spam and mail-security filters worldwide, publicly and freely queryable.
Frequently asked questions
Newly registered domains are sometimes preemptively included until they build history, especially if the registrar or host has prior bad reputation.
No, it is a domain reputation lookup, not a scan of files or malicious code on the site.