IP Blacklist Checker

Find out in seconds if an IP address is listed on any known blacklists.

Check if an IP address is listed on common Real-time Blackhole Lists (RBLs).

IP Address

Ready to Check an IP?

Enter an IPv4 address in the form on the left and click 'Check IP' to see its status across various Real-time Blackhole Lists (RBLs).

Example IPs you can try:

8.8.8.8 (Google Public DNS)
1.1.1.1 (Cloudflare Public DNS)

The results will appear here once the check is complete.

Frequently Asked Questions

Answers to common questions about IP blacklists and our checker tool.

What is an IP blacklist (RBL)?

An IP blacklist (Real-time Blackhole List or RBL) is a real-time updated database containing IP addresses known to send spam, engage in malicious activity, or otherwise violate the policies of internet service providers and email providers.

Why can an IP address be blacklisted?

An IP address can be blacklisted for several reasons, such as: sending spam, distributing viruses or malware, phishing attempts, operating an open relay SMTP server, or if the server's vulnerabilities have been exploited and it's used for malicious activity.

How does the IP blacklist checker tool work?

Our tool checks the provided IP address against dozens of known and reputable RBL databases. The results show whether the IP address is listed on any of them, and if so, which ones.

What should I do if my IP address is blacklisted?

If your IP address has been blacklisted, the first step is to identify the cause (e.g., spamming, virus infection). Once you have resolved the issue, you need to contact the operator of the specific blacklist and request the removal of your IP address from their list. The removal process may vary from list to list.

IP Blacklist Checker

Find out in seconds if an IP address is listed on any known blacklists.

IP Blacklist Checker

Check if an IP address is listed on common Real-time Blackhole Lists (RBLs).

IP Address

Ready to Check an IP?

Enter an IPv4 address in the form on the left and click 'Check IP' to see its status across various Real-time Blackhole Lists (RBLs).

Example IPs you can try:

8.8.8.8 (Google Public DNS)
1.1.1.1 (Cloudflare Public DNS)

The results will appear here once the check is complete.

Frequently Asked Questions

Answers to common questions about IP blacklists and our checker tool.

What is an IP blacklist (RBL)?

Why can an IP address be blacklisted?

How does the IP blacklist checker tool work?

Our tool checks the provided IP address against dozens of known and reputable RBL databases. The results show whether the IP address is listed on any of them, and if so, which ones.

IP Blacklist Checker

Example IPs you can try:

Frequently Asked Questions

What is an IP blacklist (RBL)?

Why can an IP address be blacklisted?

How does the IP blacklist checker tool work?

What should I do if my IP address is blacklisted?

Contact us today!

IP Blacklist Checker

Example IPs you can try:

Frequently Asked Questions

What is an IP blacklist (RBL)?

Why can an IP address be blacklisted?

How does the IP blacklist checker tool work?

What should I do if my IP address is blacklisted?