The domain is default.referrer-policy.info

User-Agent: CCBot/2.0 (https://commoncrawl.org/faq/)
Referer: 
Referrer-Policy: default
metas: default

🔓 www 🔒 www
🔓 unsafe-url 🔒 unsafe-url
🔓 origin 🔒 origin
🔓 no-referrer 🔒 no-referrer
🔓 origin-when-cross-origin 🔒 origin-when-cross-origin
🔓 same-origin 🔒 same-origin
🔓 no-referrer-when-downgrade 🔒 no-referrer-when-downgrade
🔓 strict-origin 🔒 strict-origin
🔓 strict-origin-when-cross-origin 🔒 strict-origin-when-cross-origin
🔓 default 🔒 default
🔓 always 🔒 always
🔓 never 🔒 never
🔓 always--unsafe-url 🔒 always--unsafe-url
🔓 never--no-referrer 🔒 never--no-referrer
🔓 origin--origin-when-cross-origin 🔒 origin--origin-when-cross-origin
🔓 never--same-origin 🔒 never--same-origin
🔓 default--no-referrer-when-downgrade 🔒 default--no-referrer-when-downgrade
🔓 origin--strict-origin 🔒 origin--strict-origin
🔓 origin--strict-origin-when-cross-origin 🔒 origin--strict-origin-when-cross-origin
🔓 unsafe-url--always 🔒 unsafe-url--always
🔓 no-referrer--never 🔒 no-referrer--never
🔓 origin-when-cross-origin--origin 🔒 origin-when-cross-origin--origin
🔓 same-origin--never 🔒 same-origin--never
🔓 no-referrer-when-downgrade--default 🔒 no-referrer-when-downgrade--default
🔓 strict-origin--origin 🔒 strict-origin--origin
🔓 strict-origin-when-cross-origin--origin 🔒 strict-origin-when-cross-origin--origin