On 11 Feb 2017, at 17:49, Allan Liska wrote:

ISC runs a monthly survey of DNS statistics:
https://ftp.isc.org/www/survey/reports/current/fpdns.txt (this is from
January 2017).
Information about the survey is here:
https://ftp.isc.org/www/survey/reports/current/survey.html
Not sure how useful their data is, but they have been doing it for a
long time, so they have great trending analysis.

Do note, however, that fingerprinting DNS servers has gotten much harder over time, so take the results with a very large grain of salt. For example, the software that runs that survey seems to think that there are no versions of BIND 9 since 9.4.0a0.

--Paul Hoffman

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