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IP Blacklist Check
Check if an IPv4 address appears on major DNS blacklists (DNSBLs) used by email servers and firewalls worldwide.
What is a DNS Blacklist?
DNS Blacklists (DNSBLs) are real-time databases of IP addresses associated with spam, malware distribution, phishing, and other abusive activity. Mail servers and security systems query these lists to decide whether to accept or reject connections from a given IP.
Being listed can cause email delivery failures, connection rejections, and reputation damage. This tool checks your IP against 12 widely-used blacklists simultaneously, including Spamhaus, SORBS, Barracuda, and others. If your IP is listed, visit each blacklist operator's website and follow their delisting procedure after resolving the underlying issue.
Blacklists Checked
Spamhaus SBL, Spamhaus XBL, Spamhaus PBL, SORBS SPAM, SORBS DUL, Barracuda BRBL, SpamCop, URIBL Black, Abusix Mail Intelligence, s5h.net, SpamRATS, MX Toolbox
Frequently Asked Questions
- What is a DNS Blacklist (DNSBL)?
- DNS Blacklists are real-time databases of IP addresses associated with spam, malware, phishing, and other abuse. Mail servers and security systems query them to decide whether to accept or reject connections from a given IP.
- What does being listed mean?
- Being listed means the IP has been flagged as abusive. That can cause email delivery failures, connection rejections, and reputation damage until you resolve the underlying issue and request delisting.
- How do I get delisted?
- Visit each blacklist operator's website and follow their delisting procedure. Many lists require the underlying spam or malware issue to be fixed before removal is granted.
- How many blacklists does this tool check?
- It checks your IPv4 address against 12 widely used DNSBLs simultaneously, including providers such as Spamhaus, SORBS, and Barracuda.