All HTTP status codes

HTTP 416 Range Not Satisfiable

Client Error

The Range header asks for bytes outside the resource's actual size — e.g. resuming a download past the end of the file.

Defined in RFC 9110

Common causes

  • Resuming a download of a file that changed size
  • Bugs computing byte offsets

How to fix it

  1. Re-request without Range to start fresh

  2. Validate ranges against Content-Length/Content-Range first

Related status codes

206 Partial Content

The server is delivering only the byte range requested via the Range header. The backbone of video streaming, download resumption and large-file delivery.

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