IP Blacklist Checker
Check if an IP address appears on spam, abuse or malware blacklists. Tests against 20 major DNSBL databases instantly.
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What is a DNSBL?
A DNS-based Blackhole List (DNSBL) is a database of IP addresses known to send spam, host malware, or conduct abuse. Email servers check these lists before accepting mail.
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Email deliverability
If your server IP is blacklisted your emails may go directly to spam or be rejected. Check your email server IP before sending campaigns.
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How to delist
Each blacklist has its own delisting process. Spamhaus and SpamCop have web forms. Fix the underlying issue (spam, malware) before requesting removal.
Frequently Asked Questions
What is an IP blacklist?
An IP blacklist is a database of IP addresses that have been flagged for sending spam, hosting malware, conducting port scans, or other abusive behaviour. Email servers, firewalls, and security services use these lists to block traffic from known bad actors.
Why would my IP address be blacklisted?
Common reasons include your IP being previously used by a spammer, a malware-infected device on your network sending spam, or your email server being misconfigured. Shared IP addresses from ISPs and cloud providers are particularly prone to being blacklisted due to other users activity.
How do I get my IP removed from a blacklist?
Each blacklist has its own delisting process — usually a web form on the blacklist provider's site. Start by identifying which specific blacklists your IP appears on using this checker, then visit each blacklist's website and follow their removal request procedure.
Why is my IP blacklisted?
Common reasons: your IP was used to send spam, your device had malware that sent spam, you share an IP with a spammer (common with dynamic ISP IPs), or your mail server was misconfigured and sent bounces to spam traps.
How do I get removed from a blacklist?
Fix the underlying problem first. Then visit the blacklist's website and submit a delisting request. Spamhaus has an automatic removal process for the PBL (Policy Block List). SBL and XBL require manual review.
Does this affect my web browsing?
Email blacklists primarily affect email delivery. They do not block web browsing. However, some security services use IP reputation to decide whether to show CAPTCHAs or block access.