HTTP 203 Non-Authoritative Information 狀態碼表明請求成功，但是與原始伺服器的 200 (OK) 回應相比，隨附的酬載已被具轉換功能的 代理伺服器 所修改。
203 回應相似於 Warning 標頭的 214 Transformation Applied，但後者的額外的優點在於可以套用到任何狀態碼的回應中。
203 Non-Authoritative Information
| Specification | Title |
|---|---|
| RFC 7231, section 6.3.4: 203 Non-Authoritative Information | Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content |
Accept [Translate]Accept-Charset [Translate]Accept-Encoding [Translate]Accept-Language [Translate]Accept-Patch [Translate]Accept-Ranges [Translate]Access-Control-Allow-Credentials [Translate]Access-Control-Allow-Headers [Translate]Access-Control-Allow-Methods [Translate]Access-Control-Allow-Origin [Translate]Access-Control-Expose-Headers [Translate]Access-Control-Max-Age [Translate]Access-Control-Request-Headers [Translate]Access-Control-Request-Method [Translate]Age [Translate]Allow [Translate]Alt-Svc [Translate]Authorization [Translate]Cache-Control [Translate]Clear-Site-Data [Translate]Connection [Translate]Content-Disposition [Translate]Content-Encoding [Translate]Content-Language [Translate]Content-Length [Translate]Content-Location [Translate]Content-Range [Translate]Content-Security-Policy [Translate]Content-Security-Policy-Report-Only [Translate]Content-Type [Translate]Cookie [Translate]Cookie2 [Translate]Cross-Origin-Resource-Policy [Translate]DNTDate [Translate]ETag [Translate]Early-Data [Translate]Expect [Translate]Expect-CT [Translate]Expires [Translate]Feature-Policy [Translate]Forwarded [Translate]From [Translate]Host [Translate]If-Match [Translate]If-Modified-Since [Translate]If-None-Match [Translate]If-Range [Translate]If-Unmodified-Since [Translate]Index [Translate]Keep-Alive [Translate]Large-Allocation [Translate]Last-Modified [Translate]Link [Translate]Location [Translate]Origin [Translate]Pragma [Translate]Proxy-Authenticate [Translate]Proxy-Authorization [Translate]Public-Key-Pins [Translate]Public-Key-Pins-Report-Only [Translate]Range [Translate]Referer [Translate]Referrer-Policy [Translate]Retry-After [Translate]Save-Data [Translate]Sec-WebSocket-Accept [Translate]ServerServer-Timing [Translate]Set-Cookie [Translate]Set-Cookie2 [Translate]SourceMap [Translate]Strict-Transport-Security [Translate]TE [Translate]Timing-Allow-Origin [Translate]Tk [Translate]Trailer [Translate]Transfer-Encoding [Translate]Upgrade-Insecure-Requests [Translate]用戶代理Vary [Translate]Via [Translate]WWW-Authenticate [Translate]Warning [Translate]X-Content-Type-Options [Translate]X-DNS-Prefetch-Control [Translate]X-Forwarded-For [Translate]X-Forwarded-Host [Translate]X-Forwarded-Proto [Translate]X-Frame-Options 回應標頭X-XSS-Protection [Translate]100 Continue101 Switching Protocols103 Early Hints [Translate]200 OK201 Created202 Accepted203 Non-Authoritative Information [Translate]204 No Content [Translate]205 Reset Content [Translate]206 Partial Content [Translate]300 Multiple Choices [Translate]301 Moved Permanently [Translate]302 Found [Translate]303 See Other [Translate]304 Not Modified [Translate]307 Temporary Redirect [Translate]308 Permanent Redirect [Translate]400 Bad Request [Translate]401 Unauthorized [Translate]403 Forbidden [Translate]404 Not Found405 Method Not Allowed [Translate]406 Not Acceptable [Translate]407 Proxy Authentication Required [Translate]408 Request Timeout [Translate]409 Conflict [Translate]410 Gone [Translate]411 Length Required [Translate]412 Precondition Failed [Translate]413 Payload Too Large [Translate]414 URI Too Long [Translate]415 Unsupported Media Type [Translate]416 Range Not Satisfiable [Translate]417 Expectation Failed [Translate]418 I'm a teapot422 Unprocessable Entity [Translate]425 Too Early [Translate]426 Upgrade Required [Translate]428 Precondition Required [Translate]429 Too Many Requests [Translate]431 Request Header Fields Too Large [Translate]451 Unavailable For Legal Reasons500 Internal Server Error501 Not Implemented [Translate]502 Bad Gateway [Translate]503 Service Unavailable [Translate]504 Gateway Timeout [Translate]505 HTTP Version Not Supported [Translate]511 Network Authentication Required [Translate]CSP: base-uri [Translate]CSP: block-all-mixed-content [Translate]CSP: child-src [Translate]CSP: connect-src [Translate]CSP: default-src [Translate]CSP: font-src [Translate]CSP: form-action [Translate]CSP: frame-ancestors [Translate]CSP: frame-src [Translate]CSP: img-src [Translate]CSP: manifest-src [Translate]CSP: media-src [Translate]CSP: object-src [Translate]CSP: plugin-types [Translate]CSP: referrer [Translate]CSP: report-uri [Translate]CSP: require-sri-for [Translate]CSP: sandbox [Translate]CSP: script-src [Translate]CSP: style-src [Translate]CSP: upgrade-insecure-requests [Translate]CSP: worker-src [Translate]report-to [Translate]登入後即可獲得 MDN 帳號的好處。若還沒有註冊帳號的話，將於登入後請您註冊。