They are for me, apparently because I'm using cloudflare's DNS service, and cloudflare is returning its own IP when I query for archive.vn's.
$ dig +short @8.8.8.8 archive.vn 5.196.68.232 $ dig +short @1.1.1.1 archive.vn 1.0.0.1 1.1.1.1
$ dig +short @1.1.1.1 google.com 172.217.9.14
https://news.ycombinator.com/item?id=19828317
They are for me, apparently because I'm using cloudflare's DNS service, and cloudflare is returning its own IP when I query for archive.vn's.
They don't return themselves for all hosts, I wonder by what criteria they intercept, and if this by archive.vn's or cloudflare's initiative.