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Knowledge Base

The Censys Help Center is where we publish official Censys documentation, helpful tips, and answers to frequently asked questions.

Censys Help Center

Requesting Research Access

For more information on research access to Censys Data, please see apply for Research Access to Censys Data.

Request Research Access

Requesting Results Removal

Censys scans the Internet from the subnet, which you can whitelist or blacklist if you wish. However, we would encourage you to consider whether this actually accomplishes what you are intending. Internet-wide scanning is pervasive and others will still find your host even if it's not listed in Censys. We will not censor specific hosts or certificates from the Censys results or historical datasets.

If you are a Cloudflare user and do not want your origin web server to be accessible to the public, there is information available here on how to set up your firewall.

Other Questions or Comments?

For all other questions or concerns, Censys Support can be reached at