HTTP 410 Gone vs 510 Not Extended
HTTP 410 (Gone) is a 4xx Client Error response, while 510 (Not Extended) is a 5xx Server Error response. 410 indicates that the resource is permanently gone and will not be available again. Unlike 404, this is intentional and permanent. In contrast, 510 means that further extensions to the request are required for the server to fulfill it.
Description
The resource is permanently gone and will not be available again. Unlike 404, this is intentional and permanent.
When You See It
When a resource has been deliberately removed and should be de-indexed by search engines.
How to Fix
Remove references to this URL. Search engines will de-index the page.
Description
Further extensions to the request are required for the server to fulfill it.
When You See It
When an HTTP extension required by the server is not present in the request.
How to Fix
Add the required extension headers to your request.
Key Differences
410 is a 4xx Client Error response, while 510 is a 5xx Server Error response.
HTTP 410: The resource is permanently gone and will not be available again. Unlike 404, this is intentional and permanent.
HTTP 510: Further extensions to the request are required for the server to fulfill it.
You encounter 410 when when a resource has been deliberately removed and should be de-indexed by search engines.
You encounter 510 when when an HTTP extension required by the server is not present in the request.
When to Use Which
For 410 (Gone): Remove references to this URL. Search engines will de-index the page. For 510 (Not Extended): Add the required extension headers to your request.