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 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.
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.
Posted by Sarah Miller on 25 Jan 2022
As we are constantly looking to expand the breadth of reputational data available via the Spamhaus intelligence API (SIA), we are delighted to announce that you can now access the extended Botnet Controller List (eBCL).
Until recently, our limited access methods restricted how organizations could use our IP and domain reputation data. Our engineers have developed an API that makes it easy to integrate Spamhaus’ intelligence into your existing systems to address this situation.
SIA doesn’t just return a basic binary response as to whether a resource is listed or not; it is enriched with additional metadata providing deeper insights to help speed up investigations and accelerate reporting.
This dataset contains single IPv4 addresses used by miscreants to control infected devices, otherwise known as Botnet Command and Controllers, C&Cs, or C2s.
At its heart, the eBCL is a “drop all traffic” list detailing the worst of the worse. By this, we mean that a network should not try to connect to these IP addresses under any circumstances, nor should it accept inbound traffic from them.
It will come as no surprise that given its specific focus, the eBCL is much smaller in size than that of the extended eXploits Blocklists:
The eBCL contains the following metadata for each listing, where available: ipaddress, botname, seen, firstseen, listed, valid-until, dstport, asn, lat, lon, cc, protocol, urls, domains, samples. See our technical documentation for a detailed explanation of these.
Different organizations will have different use cases for this data. However, here are some ideas our team has come up with on how this data may assist.
Vetting and monitoring IP space
There are numerous situations where it is necessary to monitor or vet IP space:
Where it’s not possible to install the BCL on a router table, you can use the eBCL via SIA to query against incoming and outgoing traffic to block connections to listed Botnet C&Cs.
You can sign up here if you’d like to trial this data via SIA. Alternatively, for those who would like an opportunity to experiment with our data over an extended period, sign up for our free Developer License, which gives six months of access to these datasets without any charge.
This API provides access to multiple datasets containing metadata relating to compromised IP addresses. These IP addresses may be exhibiting compromised behavior, including malware, worm, and trojan infections, and SMTP-specific traffic emitting spam, or cybercriminals are using them to control infected computers – botnet command & controllers.
The breadth of data available via an easily consumable API provides security developers with scores of opportunities.
17 March 2022
We’re offering an exclusive opportunity to help shape Spamhaus’ newly released Reputation Portal.
30 June 2021
Spamhaus has released the extended CSS Blocklist (CSS) and made it available via our API service. This provides users with additional insights relating to compromised and malicious IP addresses.
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.