Opt Out of Data Collection

Censys scans help the scientific community accurately study the Internet. The data Censys gathers is sometimes used to detect security problems and to inform operators of vulnerable systems so that the systems can be fixed. If you opt out of data collection, you might not receive these important security notifications.

If you want to opt out, configure your firewall to drop traffic from the subnets and ASNs we use for scanning:

• 66.132.159.0/24

• 162.142.125.0/24

• 167.94.138.0/24

• 167.94.145.0/24

• 167.94.146.0/24

• 167.248.133.0/24

• 199.45.154.0/24

• 199.45.155.0/24

• 206.168.34.0/24

• 206.168.35.0/24

• 2602:80d:1000:b0cc:e::/80

• 2620:96:e000:b0cc:e::/80

• 2602:80d:1003::/112

• 2602:80d:1004::/112

• AS398722

• AS398705

• AS398324

Additionally, our HTTP-based scans use a Censys-specific user agent, which can filter requests from our scanners.

Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)

Configuring your services to drop connections from the Censys’ subnets prevents our scanners from indexing your services. Historical data is not removed from Censys datasets as part of this change.

Host and virtual host services are typically pruned from Censys Search within 24 to 48 hours of their last observation timestamp.

Submit an abuse ticket

If you believe that you have discovered abuse associated with Censys processes or scans, please contact us at censys-abuse@censys.com.