HTTP status code

The HTTP 306 status code stands for "Unused". It was reserved in early HTTP specifications but was never actually implemented in real-world applications.

Why is HTTP 306 Unused?

• Initially intended for future use in proxy redirection.
• It was deprecated in HTTP/1.1, and no browser or server uses it.

Example Usage (If It Had Been Implemented)

If HTTP 306 were active, a response might look like this:

  
    HTTP/1.1 306 Unused
  

Summary

HTTP 306 is a reserved but unused status code, meaning it has no practical function in HTTP today. It was never implemented and is now obsolete.