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Spamhaus Userbase
At 21 October 2014 the Spamhaus Blocklists are protecting 2,199,214,000 users mailboxes
Source: Spamhaus Datafeed service
The Spamhaus Project is an international nonprofit organization whose mission is to track the Internet's spam operations and sources, to provide dependable realtime anti-spam protection for Internet networks, to work with Law Enforcement Agencies to identify and pursue spam and malware gangs worldwide, and to lobby governments for effective anti-spam legislation.

Founded in 1998, Spamhaus is based in Geneva, Switzerland and London, UK and is run by a dedicated staff of 38 investigators, forensics specialists and network engineers located in 10 countries.

Spamhaus maintains a number of security intelligence databases and realtime spam-blocking databases ('DNSBLs') responsible for keeping back the vast majority of spam and malware sent out on the Internet. These include the Spamhaus Block List (SBL), the Exploits Block List (XBL), the Policy Block List (PBL) and the Domain Block List (DBL). Spamhaus DNSBLs are today used by the majority of the Internet's Email Service Providers, Corporations, Universities, Governments and Military networks.

To meet public demand for its DNSBLs, Spamhaus has built one of the largest DNS infrastructures in the world. Its network of over 80 public DNSBL servers spread across 18 countries serves many billions of DNSBL queries to the public every day, free of charge.

The number of internet users whose mailboxes are currently protected by Spamhaus DNSBLs now exceeds 1.9 Billion (actual number is published under 'Spamhaus Userbase' on the left of this page).

In addition to generating realtime reputation data, Spamhaus publishes the Register Of Known Spam Operations (ROKSO), a database collating information and evidence on the '100' known professional spam senders and spam gangs worldwide. ROKSO is used by Internet Service Providers to avoid signing up known spammers who would abuse their networks and by Law Enforcement Agencies to help target and mount prosecutions against spam and malware gangs.

Spamhaus Project infrastructure is provided by industry sponsors and autonomous organizations that provide services to the spam filter industry utilizing Spamhaus data and technologies.

Spamhaus CEO Steve Linford speaking at the European Parliament

The Spamhaus team works with Law Enforcement Cyber Crimes teams worldwide, assisting investigations into spam senders, phishing, botnets and malware operations, and compiling profiles, backgrounds and evidence on spam gangs and spam operations.

Spamhaus's main LEA working partners are:


National Cyber-Forensics
and Training Alliance

Federal Bureau of Investigation
Spamhaus is a member of the main Law Enforcement task force dealing with international cybercrime issues, and a member of the main Internet Industry work groups set up to deal with spam and abuse issues. These include:


London Action Plan (LAP)

Messaging Anti-Abuse Working Group

Awards presented to Spamhaus include:
* Cyber Crime Fighter Award presented to Spamhaus by the Federal Bureau of Investigation's National Cyber-Forensics and Training Alliance (NCFTA).
* Internet Service Providers Association's Internet Hero of 2003 Award
* Greatest Contribution to anti-spam in the last 10 years presented to Spamhaus by Virus Bulletin Magazine.

The Spamhaus Project Organization:
18 Avenue Louis Casai, CH-1209, Geneva, Switzerland
The Spamhaus Project Ltd. Registered Office:
26 York Street, London W1U 6PZ, United Kingdom
A nonprofit company limited by guarantee.
Registered in London, England. Company No. 05303831.
Spamhaus and the Spamhaus Logo are ® Registered Trademarks of The Spamhaus Project Ltd.
© 1998-2014 The Spamhaus Project Ltd. All rights reserved.
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