The ISC Domain Survey
The Domain Survey attempts to discover every host on the Internet by doing a complete search of the allocated address space and following links to domain names. It is sponsored by Internet Systems Consortium, Inc. with technical operations subcontracted to 3waylabs. Survey data is collected and published quarterly. If you are interested in an e-mail notification for new surveys, please click here for our mailing list manager. Additional data related to the survey may be purchased from ISC. For more information, please contact email@example.com.
Domain Survey Information
The latest survey results available online are for July 2012. Buy domain survey data on DVD.
How the survey works
Host Count History (text, 1981-present)
Frequently Asked Questions
License terms for survey subscription DVD-ROM data
ISO Country Codes
Archival Data files from old surveys (through July 1997) gzipped format.
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