I noticed that while e621.net has an IPV6 address, static1.e621.net does not. When might a AAAA record be added for static1?
Topic: IPV6 for E621's CDN
Posted under Site Bug Reports & Feature Requests
e621.net has an ipv6 because it goes through cloudflare, static1.e621.net does not because it completely bypasses cloudflare and hits the server directly
I would not bet on the static server ever getting an IPv6 address