The Domain Survey has been discontinued.
The survey collected information about IPv4 only, and we felt it was increasingly misleading for that reason. The historical summary data are available below.The Domain Survey attempted to discover every host on the Internet by doing a complete search of the allocated address space and following links to domain names. It was sponsored by Internet Systems Consortium, Inc. with technical operations subcontracted to 3waylabs. Survey data were collected and published quarterly.
The most recent survey available online is dated January 2019. Data for January 2018 are flawed and are included here for amusement purposes only.
Past Results
Jan 18
Jan 17
Jan 16
Jul 15 | Jan 15
Jul 14 | Jan 14
Jul 13 | Jan 13
Jul 12 | Jan 12
Jul 11 | Jan 11
Jul 10 | Jan 10
Jul 09 | Jan 09
Jul 08 | Jan 08
Jul 07 | Jan 07
Jul 06 | Jan 06
Jul 05 | Jan 05
Jul 04 | Jan 04
Jul 03 | Jan 03
Jul 02 | Jan 02
Jul 01 | Jan 01
Jul 00 | Jan 00
Jul 99 | Jan 99
Jul 98 | Jan 98
Old Survey Results
Jul 97 | Jan 97
Jul 96 | Jan 96
Jul 95 | Jan 95
Links and Information
About the Domain Survey
FAQs about the ISC Domain Survey and definitions used