For a couple of years now, I have been working with Alain Durand at ICANN to collect statistics in DNS usage, patterns, etc. Data is updated monthly. Latest addition is a table of the concentration of DNS name servers, measured by looking at where the IP addresses of the servers are hosted. The big "winner" is of course Cloudflare, but there is also a significant correlation between being hosted by AWS or served by Akamai and have the DNS on the same network.
https://ithi.research.icann.org/graph-m9.html
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Christian Huitema (huitema@social.secret-wg.org)'s status on Friday, 17-Nov-2023 14:51:36 JSTChristian Huitema