I don't believe this answers your question directly, however late last
year I performed some analysis[0] that showed that 64.17% of the Alexa
Top 1 million domains I had queried for www records returned CNAME
records that pointed to apex A records. If it is of use for this work I
could re-run this and give you up-to-date information that answers this
fully.
Regards
0: https://thpts.github.io/a_or_cname/analysis/ietf-dnsop-2018-11-21/
On 14/06/2019 21:19, Bob Harold wrote:
Does anyone have data on how many "www" names have or do not have A/AAAA
data for the label without the "www"?
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