Blacklist Lookup

Search Engine Optimization

Blacklist Lookup

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About Blacklist Lookup


Blacklist Lookup Tool is used to search Domain Name Server Blacklist (DNSBL) to check the blacklist status of an IP or URL.

Enter the URL above and click on submit button to check the blacklist status.

What is meant by blacklisting an IP address?

This tool checks whether the provided URL, IP address, or email server's IP is listed with DNSBL. Email management providers utilize that database to filter out spam emails before they finally reach the end users.

For instance, if your company uses an email marketing tool and you send out hundreds or thousands of emails to promote your new product, some of the receivers flag that email as spam. There is more chance that your IP would be on the IP blacklist, which needs to be avoided.

Blacklisting of IP addresses is the process or method to filter out or block illegitimate or malicious IP addresses to access your network. It occurs when a web hosting provider ultimately ignores your IP address. More precisely, every email you try to send is consequently blocked and filtered as spam.

One estimate concludes that email traffic consists of more than 80% of spam emails. That overwhelming amount of bulk emails lead to strict blacklisting practices to keep the inboxes spam-free.

About DNSBL?

DNSBL stands for Domain Name System Blacklist, it is the blacklist system that allows the administrator to block the messages from specific IP that has a history of sending spam emails. The list is based on the Internet's Domain Name System, which converts the IP address into the domain, and makes it much easier to understand.

For example, a maintainer of a blacklist in the past received any spam email from a specific domain. It would include that server/IP in its blacklist. All the messages sent from that particular server or IP address would either be rejected/flagged by all the websites that use that blacklist to avoid spam. DNSBL is the first line of defense.

Dozens of DNSBLs are available online, and each one has its own set of rules and offensive categories to focus on. The most common annoying type is spam, but some blacklists focus more on hacking, malware, botnets etc. The email administrators use these DNSBLs to identify if the incoming email is generated or originated from the blacklisted server or not.

About SURBL?

SURBL is a list of websites that appear in unsolicited messages. It is the second line of defense, but not all spam filters can utilize it.

With the passage of time, the spammers become pretty intelligent, and there is no proper way to catch every spam message. The email administrators use the SURBLs to check the email messages' body text to extract any website address present and check it against the blacklists. If any address is found, the message would be treated either as spam or handled accordingly as per the instructions.

How an IP blacklist integrates with an Email service?

The process is simple.

For example, you send an email from to some user Lisa.

Lisa's mail server will determine the sender's IP address and resolve it into the domain name.

Lisa's mail server checks both the domain and the sender's IP address in the IP/domain blacklist database.

If the IP or domain is blacklisted, your email will most likely land in Lisa's spam/junk mail folder without the message being scanned.

If the IP or domain is already in the repetitive spam sender list, the ISP's spam filters will reject its message, meaning it won't even reach Lisa's spam folder.

Why is my IP address blacklisted?

A blacklist is a database of IP many addresses that are believed to send spam. Emails sent from these IP addresses/servers are either blocked or routed to the recipient's junk/spam folder or handled accordingly.

Your IP may be in a single blacklist or multiple blacklists. There is no centralized authority for that. Each blacklist is managed independently, and each has its own criteria for listing or delisting the IP address in its blacklist.

There are several reasons that your IP is on the blacklist.

The main reasons for IP blacklisting may be the virus, malware, and sending many spam emails.

If you run a mail server that is not properly configured, which results in sending spam, or you intentionally send spam emails, then definitely your IP address would become blacklisted.

Maybe you tried to buy email lists from a third party containing a lot of incorrect or spam email addresses.

The majority of email receivers mark your email as spam.

Someone has hacked your email account and using it for spammy activities.

There is also a scenario in which your IP is on the blacklist; even if you did not do anything wrong. This frequently happens when having a DHCP IP address. Most of the blacklist maintainers automatically add the IP address that is assigned via DHCP by ISP. Even though you are not a spammer, maybe the person who had your IP address previously, using it for spamming activity. Only your ISP has a record of who had that IP address before assigning it to you.

Your site can even be listed on a search engine's blacklist, and no legitimate website wants this. Many reasons can play a role in this regard.

If your website is spammy or maybe, you are getting backlinks from spammy websites.

Your website is suspected of being used for hacking purposes.

Once the website is added to the search engine's blacklist, it will vanish from the internet.

How can you use the IP Blacklist, Email Blacklist, Domain Blacklist Check

to identify your IP status or perform the IP blacklist lookup?

Several free online tools and websites can check that the given URL, IP address, or email server IP is consequently listed with DNSBL or SURBL systems.

To check your IP status or perform the IP blacklist lookup.

Open the IP Blacklist & Email Blacklist Check Tool.

Enter the URL, IP address, or email server IP address whose status you want to check.

Click on the "submit" button.

The tool will take 20 to 40 seconds to perform the IP blacklist lookup and provide you with the results.

If your IP is listed in the particular blacklist, it will show "Yes" in front of that blacklist or vice-versa.

How do you get off the blacklist, or what to do if your IP is blacklisted?

To remove the blacklist or to clear your name from being blacklisted, first, you must check that your system is free from any virus or malware and no unauthorized traffic is going out from your system. Find out where your IP is blacklisted and contact them.

Investigate why they entered your IP address in their blacklist. The majority of the blacklist provides general listing reasons. You must check each of them.

The majority of the blacklist allows you to submit the removal request. Each blacklist has a different method to raise the removal request.

Submitting the removal request is an attempt from your end. It does not mean that the Blacklist maintainer will honor your request.

Why my IP address remains on a blacklist?

The most common cause that your IP address keeps getting blacklisted is that your IP address has been reported and consequently blacklisted for sending junk emails.

If you are a home user, having your IP address on the blacklist would not make much difference.

However, if you are running a business or having a mail server, you must delist IP address.