Look up a status, pick the right one for an API, or hit a live endpoint that actually returns it. Add ?code=418 to this URL and the response is that status — useful for curl, interceptors, and “what does my client do on 503?” Nothing here phones home except the Try it fetch to this same page.
Which class?
Cloudflare cannot reach the origin IP (routing, DNS, or blackhole).
When to use
Wrong origin IP, network partition.
Don’t
App-level outage with a live TCP port is 503.
Live URL
curl -i https://corecoding.com/utilities/http-status.php?code=523
No codes match.
Code use cases