// REFERENCE
510 Not Extended
Class: 5xx
The server needs further extensions in the request to fulfill it (RFC 2774). Practically obsolete.
Related tools
Work with this in:
Related
500
500 Internal Server Error 501
501 Not Implemented 502
502 Bad Gateway 503
503 Service Unavailable 504
504 Gateway Timeout 505
505 HTTP Version Not Supported
500 Internal Server Error 501
501 Not Implemented 502
502 Bad Gateway 503
503 Service Unavailable 504
504 Gateway Timeout 505
505 HTTP Version Not Supported
Semantics per RFC 9110 and the IANA status code registry. Educational content.