IP Blacklist Check

An IP blacklist check tool queries multiple spam and threat databases to determine whether an IP address has been flagged for malicious activity.

The tool simultaneously queries over 15 major blacklist providers including Spamhaus, Barracuda, SORBS, AbuseIPDB, and SpamCop. Results are returned in seconds and include which specific lists flagged the IP and links to each provider's removal process.

Frequently Asked Questions

What is an IP blacklist?

An IP blacklist is a database of IP addresses associated with spam, malware, or abuse. Email servers, firewalls, and security services consult these lists to block traffic from known bad actors.

How do IPs get blacklisted?

IPs get blacklisted by sending spam, hosting malware, being part of a botnet, or receiving abuse reports. Shared hosting IPs can get blacklisted because of other tenants on the same server.

How do I get my IP removed from a blacklist?

Each blacklist has its own removal process. For Spamhaus, submit a removal request at spamhaus.org. For most lists, you must first fix the underlying issue (stop spam, remove malware), then request delisting. The process takes 24 to 72 hours typically.

Does being blacklisted affect my email?

Yes. Most email providers check major blacklists before accepting mail. If your sending IP is on Spamhaus SBL or Barracuda, your emails will be rejected or sent to spam. Check your IP at whatismyip.technology/tools/blacklist-check before troubleshooting email issues.