Kode status dari program webserver Apache ini untuk memudahkan menganalisa access.log atau error.log dari website anda. Berikut klasifikasi kode error milik program apache.

Digit pertama menyatakan kelas-kelas dari jawaban apache:

1xx: Informational - Request received, continuing process
2xx: Success - The action was successfully received,understood, and accepted
3xx: Redirection - Further action must be taken in order to complete the request
4xx: Client Error - The request contains bad syntax or cannot be fulfilled
5xx: Server Error - The server failed to fulfill an apparently valid request

Untuk detail digit berikutnya lebih lengkapnya adalah sebagai berikut.

"100"  ; Section 10.1.1: Continue
"101"  ; Section 10.1.2: Switching Protocols
"200"  ; Section 10.2.1: OK
"201"  ; Section 10.2.2: Created
"202"  ; Section 10.2.3: Accepted
"203"  ; Section 10.2.4: Non-Authoritative Information
"204"  ; Section 10.2.5: No Content
"205"  ; Section 10.2.6: Reset Content
"206"  ; Section 10.2.7: Partial Content
"300"  ; Section 10.3.1: Multiple Choices
"301"  ; Section 10.3.2: Moved Permanently
"302"  ; Section 10.3.3: Found
"303"  ; Section 10.3.4: See Other
"304"  ; Section 10.3.5: Not Modified
"305"  ; Section 10.3.6: Use Proxy
"307"  ; Section 10.3.8: Temporary Redirect
"400"  ; Section 10.4.1: Bad Request
"401"  ; Section 10.4.2: Unauthorized
"402"  ; Section 10.4.3: Payment Required
"403"  ; Section 10.4.4: Forbidden
"404"  ; Section 10.4.5: Not Found
"405"  ; Section 10.4.6: Method Not Allowed
"406"  ; Section 10.4.7: Not Acceptable
"407"  ; Section 10.4.8: Proxy Authentication Required
"408"  ; Section 10.4.9: Request Time-out
"409"  ; Section 10.4.10: Conflict
"410"  ; Section 10.4.11: Gone
"411"  ; Section 10.4.12: Length Required
"412"  ; Section 10.4.13: Precondition Failed
"413"  ; Section 10.4.14: Request Entity Too Large
"414"  ; Section 10.4.15: Request-URI Too Large
"415"  ; Section 10.4.16: Unsupported Media Type
"416"  ; Section 10.4.17: Requested range not satisfiable
"417"  ; Section 10.4.18: Expectation Failed
"500"  ; Section 10.5.1: Internal Server Error
"501"  ; Section 10.5.2: Not Implemented
"502"  ; Section 10.5.3: Bad Gateway
"503"  ; Section 10.5.4: Service Unavailable
"504"  ; Section 10.5.5: Gateway Time-out
"505"  ; Section 10.5.6: HTTP Version not supported

semoga membantu :)