IP Blacklist Checker
Instantly check if an IP address is listed on major DNS-based blacklists (DNSBLs) and identify potential reputation issues.
Spam Source Detection
Identifies IPs listed as open relays or spam senders across major DNSBLs.
Malware Distribution Check
Flags IPs associated with malware hosting or distribution activity.
Proxy & Tor Node Detection
Detects IPs used as proxies or Tor exit nodes, often linked to anonymized malicious traffic.
Other Malicious Activity
Covers phishing, botnets, and other categories of suspicious or harmful IP activity.
A listing on one or more of these blacklists can negatively impact email deliverability, website accessibility, and overall IP reputation.
An IP blacklist is a real-time database of IP addresses that are known or suspected sources of spam, malware, phishing attacks, or other malicious activities. Email servers, firewalls, and other security systems use these lists to filter out unwanted traffic.
Clean: If your IP is marked as 'Clean', it means it was not found on the blacklists we checked. This is good for your IP reputation and email deliverability.
Blacklisted: If your IP is 'Blacklisted', it has been flagged by one or more services. This can lead to your emails being rejected or marked as spam, and your access to certain websites or online services might be restricted.
Email Deliverability Issues
Your emails may be blocked or sent to spam folders, reducing communication effectiveness.
Damaged Sender Reputation
It becomes harder to reach inboxes as your IP's reputation declines among mail providers.
Blocked Access
You might be unable to access certain websites or online services due to blacklisting.
Security Alerts
Your IP might be flagged as a security risk by various systems, triggering alerts or blocks.
Loss of Trust
Users and other services may lose trust in communications from your IP, impacting business and reputation.
If your IP is blacklisted, it's crucial to identify the cause (e.g., a compromised device on your network, sending unsolicited emails) and take steps to resolve it, then request delisting from the relevant blacklist providers.
Proactive monitoring and responsible network usage are key to maintaining a positive IP reputation. If you manage mail servers, ensure they are secure and not relaying spam.
Quick and accurate IP blacklist status.