HTTP response status codes All In One
Informational responses (100–199)
Successful responses (200–299)
Redirection messages (300–399)
Client error responses (400–499)
Server error responses (500–599)
The below status codes are defined by section 10 of RFC 2616.
You can find an updated specification in RFC 7231.
Custom HTTP Status Code
550
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refs
https://developer.mozilla.org/en-US/docs/Web/HTTP/Status#server_error_responses
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