Blacklist Checker

OpenPort IP blacklist checker tool will check the provided IP address in a blacklist database. This tool uses public DNSBL, Domain Name System Blacklists, websites and check if the given IP is appearing in them. If Blacklist Checker finds a record of the given IP in the list it means that the IP is blacklist. [beta]

  • Please note, running the tool can take up to 60 seconds.

We have an extended IP blacklist checker tool that supports deeper backlist test. You can use it if you like, but know that it can take up to 5 min to get the result.


What is blacklist checker?

A blacklist check for IP tool is a service that checks if the given IP address appears on one of the DNSBL websites. If it manages to find a record of the IP. Found means that the IP address that was provided for the blacklist check is flag as backlist. The anti-spam databases list information about it.

Blacklist Checker Tool
Blacklist Checker Tool | Image by Darwin Laganzon from Pixabay

Why use IP blacklist checker?

Using this tool you can verify if one of the following is in the blacklist list:

  1. The IP address that you are using.
  2. If you own a website, you can check the site IP address.
  3. What about the mail server IP address.
  4. A given email address.
  5. Other sites that you suspect that they are blacklist.

Using blacklist checker to check email:

To check an email address using our tool you will have to put the domain name of the email address, here is how to do it. Email address combines from 2 parts that split with the @ tag. What comes before the @ tag is the name and what is after the @ is the domain name. This is the part you need to put in our tool to check.

Take a look at the following example:

Email address: – In this case, you need to take and put it in the tool to run the check. This will check if is in the blacklist or not.

In today cybersecurity awareness it is very important to make sure we are not giving away our sensitive information to

What is IP address blacklist?

A blacklisted IP is an IP address that mark as spam, means there are problematic activities from that IP. Can be due to illegal activity, been hacked, infected with malware, etc. please note, that one IP address can hold multiple domains if one of the domain get blacklist means its IP mark as blacklist and that can affect other domain that uses the same IP address.

Blacklist check original script (c) by tbreuss

If you find bugs or want to share an idea, comments or want to contact us, please use the contact page.