Blacklist Checker

Check whether your domain has been blacklisted. 

Online Blacklist Checker: Protect Your Email Deliverability & Online Reputation

Our free online Blacklist Checker is an essential utility for website owners, email marketers, IT professionals, and anyone concerned about their online presence. This powerful tool allows you to quickly determine if your IP address or domain name is listed on any of the major real-time blacklists (RBLs/DNSBLs) that internet service providers and email servers use to block spam and malicious traffic.

Why Use Our Online Blacklist Checker?

Being blacklisted can have severe consequences for your online operations. Our tool helps you proactively identify and address these issues:

Protect Email Deliverability: If your IP or domain is blacklisted, your emails (marketing campaigns, transactional emails, or even personal correspondence) might be rejected outright or sent straight to recipients' spam folders. Our checker helps you diagnose why your emails aren't reaching their destination.

Maintain Website Reputation: A blacklisted IP associated with your website can negatively impact your search engine rankings and overall online credibility, as some users or systems might block access.

Troubleshoot Network Issues: Helps identify if a server or network connection has been compromised or is being used for spamming, leading to its inclusion on a blacklist.

Prevent Service Disruption: Early detection of a blacklist entry allows you to take corrective action before it severely impacts your business communication or website accessibility.

Due Diligence: When setting up new services or acquiring domains, it's wise to check their blacklist status to avoid inheriting existing problems.

Understanding IP & Domain Blacklists (RBLs/DNSBLs)

Real-time blacklists (RBLs), also known as DNS-based Blackhole Lists (DNSBLs), are databases maintained by various organisations. They contain IP addresses or domain names that have been identified as sources of spam, malware, phishing attempts, or other abusive online activity. Email servers and other internet services regularly consult these lists. If your IP or domain appears on one, it's a strong signal for the receiving server to block or quarantine your traffic.

Being listed often indicates that:

Your IP address has sent spam.

Your server has been compromised by malware.

Your domain is associated with suspicious activity.

Your email practices (e.g., sending to invalid addresses) have triggered spam traps.

How Our Online Blacklist Checker Works

Using our Blacklist Checker is simple and provides immediate, comprehensive results:

Enter Your IP Address or Domain: Input the domain name (e.g., https://ourwebsite.co.uk) you wish to check into the designated field.

Instant Scan: Our tool will then query a wide array of prominent and frequently updated blacklists from around the world (as shown in your example: nsbl.justspam.org, pbl.spamhaus.org, zen.spamhaus.org, dnsbl-1.uceprotect.net, etc.).

Clear Status Output: For each blacklist queried, you will see a clear 'Listed' or 'Not-Listed' status. If your IP or domain is listed, it will be clearly indicated, helping you identify exactly where the problem lies.

Use

Guest: 7 Checks per 24 Hours

Logged in: 10 Checks per 24 Hours

Paid Plan:  50 Checks per 24 hours