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.
Data for Integration
Enhance your service and create competitive advantage by integrating Spamhaus’ world-class IP and domain reputation data.
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 a parter
Discover our partners and how they can support you.
Become a partner
Learn about the benefits of being a Spamhaus partner and how to get started.
Discover a wide range of blog posts, case studies and reports.
Spamhaus’ insight into malware, botnet C&Cs, and the domain reputation landscape.
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.
The Reputation Portal
A tool for ASN owners to get visibility of their IPs’ reputation and proactively manage listings.
Help for the Project's legacy DNSBLs users
Using the Project’s legacy blocklists and suddenly experiencing email issues? This page may be able to help.
In depth information about the technical details and implementation of our products.
This API provides you with easy access to metadata relating to malicious and compromised IP addresses.
Spamhaus Intelligence API (SIA) contains enhanced IP reputation data that integrates with your applications. This provides you with increased visibility on where issues have occurred and accelerates reporting.
In this easy-to-consume format, SIA can be used for incident response, online real time risk assessment, monitoring trends and more.
The Spamhaus Intelligence API (SIA) is an API that allows you to easily access our IP reputation datasets for integration into your existing infrastructure, including threat intelligence platforms, websites, analysis, and reporting mechanisms.
Anyone who needs to provide context around IP addresses that are compromised or sending spam.
Visit our technical documentation for access details and additional technical information regarding SIA.
Based on the number of queries per month and second, prices start at $5,000 per year. Contact our sales team for further details.
Developers wishing to take the time to explore, build and test with the data can sign-up for free access to SIA via our Developer License, with up to 5,000 queries per month.
SIA provides access to live and historical metadata relating to IP addresses that indicate compromise, are emitting spam, or are dedicated botnet command and control servers. These IPs are listed on the Spamhaus extended eXploits Blocklist (eXBL), the extended CSS Blocklist (eCSS), or the extended Botnet Controller List (eBCL).
This dataset focuses on compromised devices. Our research team lists IP addresses showing indications of malware, Trojan or worm infections, devices controlled by botnets command and controllers (C&Cs), along with third-party exploits, such as open proxies.
This dataset on average contains 4 million listings, with up to 75,000 newly observed IPs added every 24 hours.
This dataset is specific to SMTP traffic, only listing port-25 based detections. Potential triggers for a listing include unsolicited emails, having poor email marketing list hygiene, or sending out malicious emails due to compromised accounts or content management systems (CMS).
This dataset contains between 300,000 – 1.5 million listings, with up to 285,000 new listings added every 24 hours.
This dataset only contains single IPv4 addresses which are being used to host botnet command and controller servers (C&Cs). No inbound or outbound network connections should be made to these IP addresses under any circumstances.
This dataset contains approximately 300 – 1,500 listings, with up to 50 new entries every 24 hours.
Datasets to reduce investigation times and provide additional insights for security professionals. These include enhanced eXploits blocklist and Passive DNS data.
Get a free 30 day trial of the Spamhaus Intelligence API. No credit card details required.
2 November 2022
As of Wednesday, November 9th, the CSS dataset will start to grow. We anticipate the addition of 1.5 million listings over the next 4-6 months; that's approximately a 100% increase! Find out why and the impact to you in this blog.
28 October 2022
Commercial or developer subscribers to any IP datasets via Spamhaus Intelligence API (SIA) will experience improved performance and search capabilities for this service.
14 September 2022
Discover the rich domain-related data points available via this easy-to-consume API and how you can become one of only 30 beta testers.
Explore. Build. Test. Solve. This is your opportunity to experiment with our data and see what challenges it can help you resolve.