https://commoncrawl.github.io/ipv6-analysis/
From the list of the 1212 I took some examples.
https://www.fcc.gov/
https://www.ups.com/
They work for me with the browser firefox.
Only wget/curl doesn't work.
🤨
in case you want check some examples by yourself:
here is the extracted list
@tschaefer I was guessing that is was JA3 fingerprinting block. You just confirmed it.