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    ToolsIP Blacklist Checker
    Security Tools

    IP Blacklist Checker

    Spam and abuse blacklist status

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    How to Use This Tool

    1. Enter an IPv4 address.
    2. Reversed IP is queried against multiple DNSBL zones.
    3. Listed databases are highlighted in results.

    About This Tool

    Blacklist checking queries major DNSBL databases to see if an IP has been flagged for spam, abuse, or malicious activity.

    Common use cases

    • •Check if a VPN or proxy is detected on your connection
    • •Validate SSL certificates before launch
    • •Scan for email addresses in known breaches

    Frequently Asked Questions

    Need your IP address first?

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    What Is My IP

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