206 Partial Content
Here's the bit you asked for.
What it properly means
Sent when the client used the Range header to ask for only part of a resource.
- Class
- 2xx Successful: here you go
- Defined in
- RFC 9110, section 15.3.7
Get one yourself
This endpoint really answers with 206. Point your client at it and see what it does.
curl -i https://httpcodes.dev/api/206