HTTP 416 status code

416 Requested Range Not Satisfiable

If the request contains the Range request header, and any data range specified in the Range does not coincide with the available range of the current resource, and the request does not define If-Range request header, the server should return a 416 status code.

If Range uses a byte range, then this situation means that the first byte position of all data ranges specified by the request exceeds the length of the current resource. The server should also include a Content-Range entity header to indicate the length of the current resource while returning the 416 status code. This response is also prohibited from using multipart/byteranges as its Content-Type.