306 Unused
We don't talk about this one.
What it properly means
No longer used, just reserved. It appeared in an earlier version of the HTTP/1.1 specification.
- Class
- 3xx Redirection: go away
- Defined in
- RFC 9110, section 15.4.7
- Notes
- unused
Get one yourself
This endpoint really answers with 306. Point your client at it and see what it does.
curl -i https://httpcodes.dev/api/306