Bulk Data Access

We provide bulk access to the data that powers Censys for both enterprise customers and approved non-commercial researchers. These datasets contain curated, labeled data that describe IPv4 hosts, websites, and certificates, as well as what we have found in historical scans. For commercial information, please contact our sales team. To apply for research access, please see Research Access to Censys Data.


Raw Scan Data

We also publish the raw handshakes from our horizontal Internet scans. These data files contain the ZMap or ZGrab JSON output for the scan of a single port or protocol. For example, JSON encoded transcript of a TLS handshake with every IPv4 host on TCP/443.

We provide access to last month's data for all Censys users. Our most recent scans and historical records are available to confirmed researchers and enterprise customers. For commercial information, please contact our sales team. To apply for research access, please see Research Access to Censys Data.

IPv4 Address Space


Alexa Top Million


Other Internet Scans