IP Blacklist Check
Is your IP blacklisted? We test it live against major DNSBL spam and abuse databases — SpamCop, DroneBL, UCEPROTECT, Spamhaus and more. The queries run in your browser; nothing is stored.
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What is an IP blacklist — and why should you care?
A DNSBL (DNS-based blacklist) is a public, real-time database of IP addresses that have been observed sending spam, hosting malware or otherwise misbehaving. Mail servers worldwide query these lists on every incoming connection: if your address appears on one, your emails can land in the spam folder or bounce outright. Websites, VPN providers and game servers use them for blocking, too.
Common reasons an IP gets listed
- Malware on your network — an infected computer or IoT gadget silently sending spam.
- Misconfigured mail servers — open relays and servers without proper SPF/DKIM attract listings fast.
- Bad neighbourhood — shared hosting or dynamic IP ranges where a previous user abused the address.
- Aggressive bulk email — legitimate newsletters sent without permission or too quickly.
Listed? Here's the way out
- Find the cause. Scan devices for malware, review mail logs, check for open proxies/relays on the address.
- Stop the abuse. Blacklists re-list repeat offenders quickly — removal requests only work once the problem is fixed.
- Request removal at the source. Every row in the results table links to the operator's own lookup/delisting page; follow their process.
- Be patient. Many lists expire listings automatically after days or weeks of quiet.
Note on Spamhaus Zen: the most famous blacklist restricts public DNS resolvers, so results via this page may show "unavailable". Check it directly at check.spamhaus.org for an authoritative answer.
Want to understand the address you're checking better? Locate it on the map, check whether it's a proxy or VPN, or look up its reverse DNS — mail servers expect a valid PTR record too.
Blacklist questions
What is an IP blacklist?
An IP blacklist (DNSBL) is a public database of addresses that have been reported for sending spam, running malware or other abuse. Mail servers and websites query these lists in real time to decide whether to trust a connection.
Why is my IP address on a blacklist?
The most common causes: a device on your network is infected and sending spam, your mail server is misconfigured (open relay), or your address sits in a range that was previously abused by someone else. Dynamic home IPs are frequently listed simply because of their history.
How do I get my IP removed from a blacklist?
First fix the underlying cause (remove malware, secure the mail server, stop abusive traffic). Then use the removal or delisting page of the specific blacklist — each result in the table links to it. Most lists delist automatically once the abuse stops and a waiting period passes.