Our Passive DNS data and extended blocklists provide increased insight, shining a broader light on malicious activity. This helps security teams and researchers speed up investigations and verify potential threats.

These datasets can all be consumed via an API, and Passive DNS is available via a web portal or continuous datafeed.
The Passive DNS PRO plan is available for a free 30-day trial, and our Basic Passive DNS subscription is free.


Passive DNS

Passive DNS data is collected with special probes activated on a DNS resolver. The probes record anonymized data every time a DNS resolver is unable to return a domain name from its caches and sends a recursive request to another name server (cache miss).

Spamhaus data is collected through numerous recursive DNS servers from around the globe. A broad network of service providers and a community of security researchers who are dedicated to combatting DNS abuse share this data for the good of the internet.

Researchers at The Spamhaus Project utilize Passive DNS data daily in their research and threat hunting.

The following records are listed in Spamhaus’ Passive DNS data: A, AAA, NS, MX, CNAME, TXT, SPF, SOA, SRV, PTR. Date and time stamps are included with each record.

Multiple search functions are available in the Spamhaus Passive DNS tool; these simplify and quicken the ability to search the billions of Passive DNS records listed.


Enhanced Domain Blocklist

This provides detailed information on each domain listing and is available via an API. This enables you to query the DBL engine, returning a JSON record for each domain that you are investigating.

The Enhanced Domain Blocklist (eDBL) helps you to track a particular domain’s score over a longer period, or combine Domain Blocklist data with information from your own threat intelligence platform.

Data included in the eDBL: DBL score, the date that the domain was first seen and last seen, along with additional data fields.

To find out more about the eDBL or for a 30 day free trial, please complete our contact form.


Extended eXploits Blocklist

This blocklist is a real-time database of raw and filtered feeds that provides additional information on hijacked IP addresses. The eXBL is available to selected security organizations and cyber incident response teams.

Data included in the eXBL:  timestamp of the last connection, the botnet’s name controlling infected nodes, the IP address and port number of the command and control server for some connections, the countries where compromised devices are located, and the type of malware used to exploit devices.

This data is available via the Spamhaus Intelligence API (SIA) to enable easy integration with SIEMs and SOCs, along with other security and reporting applications.  Developers can get limited free access via our Developer License.