IP Blacklist Checker (DNSBL)
See if an IPv4 address is listed on major spam and abuse blacklists.
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Frequently asked questions
What blacklists are checked?+
We query several widely used DNSBLs including Spamhaus ZEN, SpamCop, Barracuda, SORBS and s5h.net, then show which list the IP appears on.
Why is an IP blacklisted?+
IPs get listed for sending spam, abuse, or belonging to a network with a poor reputation. Shared and datacenter IPs are listed more often than clean residential ones.
How do I get off a blacklist?+
Each blacklist has its own delisting process on its website. The most reliable fix is to use a clean residential or ISP IP that is not listed.
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