Have you been blocked?
All blocklists are researched and managed by The Spamhaus Project.
Simply click on the link below, which will take you to the Project’s IP and Domain Reputation Checker. From here you will be able to enter your IP or Domain and begin your request for removal.
Please note that the Project’s IP and Domain Reputation Checker is the only place where removals are handled.
IT and security teams consistently face multiple business challenges. Discover how our solutions can help overcome some of those issues.
From processing issues, to email-borne threats our blocklists easily integrate with your current email set-up to improve anti-spam & anti-virus email filtering.
Employ our threat intelligence to increase visibility across security events, reveal potential weaknesses in your network, and threats to your brand.
Stay on top of the latest threats and proactively combat botnet infections, and other forms of abuse, with our solutions.
From clicking on phishing emails to visiting malware dropper sites, our threat intelligence provides automatic protection for your users.
Our products provide additional layers of security for networks and email. They also present security teams with additional insight into malicious behavior.
Border Gateway Protocol (BGP)
Block the worst of the worst at your network edge, taking advantage of your existing BGP-capable routers. Configuration only takes minutes.
Data Query Service (DQS)
Benefit from industry-leading real time blocklists. These DNSBLs easily plug into your existing email infrastructure to block spam and other email threats.
A powerful research tool to investigate relationships between internet infrastructures. Quickly pivot to new areas of concern to rapidly investigate potential threats.
Immediately block connections to dangerous sites, including phishing and malware dropper websites. A ‘set and forget’ solution.
Spamhaus Intelligence API
Threat intelligence data in API format to enable users to easily integrate metadata relating to threats with their own applications, programs, and products.
A wide range of datasets, providing multiple layers of protection. They can be plugged directly into your existing hardware, making them an affordable choice.
Border Gateway Protocol (BGP) Feeds
Do Not Route Or Peer (DROP) and Botnet Controller List (BCL) datafeeds can peer with your existing BGP-capable router.
Domain (DBL), Zero Reputation (ZRD) and Hash blocklists (HBL) enable you to block content in emails, filtering out a higher rate of email-borne threats.
Data for Investigation
Passive DNS and extended datasets give you additional information on internet resources. They provide deeper insights into incidents and possible threats.
DNS Firewall Threat Feeds
A wide range of feeds to apply to your DNS recursive server. Choose the right level of protection for your organization.
Spam (SBL), Policy (PBL), Exploits (XBL) and Auth (AuthBL) blocklists allow you to filter email from IPs associated with spam, botnets, and other threats.
Find out more about us.
Learn more about Spamhaus; who we are, and what we do.
Find out who we work with and how you can become a Spamhaus Partner.
Discover a wide range of blog posts, case studies and reports.
Commonly asked questions about Spamhaus products and processes.
The Blocklist Tester
A tool to help you check if your servers are correctly configured to use Spamhaus DNSBLs.
In depth information about the technical details and implementation of our products.
Our industry-leading, real time datasets safeguard against malware, phishing, botnets, spam, and more. We protect over three billion mailboxes globally.
Spam causing performance issues? Worried about rising costs from multiple email filtering licenses? Spamhaus' blocklists are an effective and economic solution.
Compromised by ransomware? Concerned about botnet threats? Utilizing datasets at the DNS level and network edge provides automatic protection without the need for additional hardware.
Worried about users clicking on phishing emails and downloading malware? Users receiving business-compromising emails? Using our datasets throughout your infrastructure will protect your users.
Need to identify phishing domains? Want deeper insights on compromised internet infrastructures? Drawing on Passive DNS and extended datasets, available via API, will provide rapid answers.
Spamhaus is the trusted authority on IP and domain reputation data, with over two decades of experience. This experience, the quality and accuracy of data, alongside our robust infrastructure, is what sets us apart.
Our data protects and provides insight across networks and email worldwide. Spamhaus’ datasets are used by leading global technology companies, internet service providers and hosting companies, among others. We currently protect over three billion mailboxes daily.
Spamhaus’ threat intelligence data sets are plugged directly into your existing infrastructure. This saves on additional hardware costs. They update in real time, protecting your email systems, networks, and users from the latest threats. You can also investigate incidents and compromised internet infrastructure utilizing our data. Our highly experienced team of researchers work on your behalf to detect threats from spam, malware, ransomware, botnets and phishing threats.
The Spamhaus Project researches and manages the blocklists. To request removal from one of the Spamhaus blocklists, please click on the button below.
23 March 2021
We're aware that it can take time to find the right use case and build the right application to meet its needs. So, we've created a license to give developers access to the data without the 30-day time limit attached to a trial. The developer license runs for six-month periods.
Global cybersecurity software company, Red Sift, use the Spamhaus Intelligence API to free up time for their customers while providing important insight on why an IP is blocked.
29 October 2019
As IT budgets and resources are squeezed it's understandable to shop around, be it for hardware, software, or threat intelligence data, for that matter. But beware...not all email blocklists (DNSBLs) are equal.
13 August 2018
Understand how Passive DNS is changing the way Security and Marketing professionals operate when it comes to identifying cyber threats and fraud.
"Spamhaus data allows us to add huge amounts of value for our customers and beyond."
Deepak Prabhakara, Founding Engineer and CTO, Red Sift