DNS Residential Services

While we greatly appreciate the data we receive from each and every one of our contributors, we're always interested in adding more.

Operating a Passive DNS sensor and contributing data is technically straightforward. Since the data contributions focus solely on upstream cache miss traffic, there is no privacy impact for local users.

Each Passive DNS data contributor helps the community to better understand what's happening on the Internet — including providing data that will help the community win the fight against cybercrime, botnets, malware, and other sorts of online abuse. Although Farsight Security is a for-profit company and we finance our operations through subscription fees, we are committed to supporting law enforcement agents, academic researchers, and non-profit organizations with full or partial grants of our services. To learn more about ordering our services, please visit our