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Response Header

Content-Range

: bytes 0-1023/146515

Indicates which portion of a resource is delivered in a partial response.

DirectionResponse Header
StatusStandardized
Seen with206, 416
Defined inRFC 9110, Section 14.4
Updated2026-10-14

What is the Content-Range header?

The Content-Range response header describes where a returned chunk of data fits within the complete resource. It accompanies a 206 Partial Content response and states the byte range being sent along with the total size of the full representation.

API Usage & Best Practices

  • Reassembling downloads: Clients use the range and total-length values to place each chunk correctly and to know when the whole resource has been received.
  • Signaling unsatisfiable ranges: In a 416 Range Not Satisfiable response, Content-Range: bytes */146515 reports the total size so the client can retry with a valid range.

Examples

HTTP/1.1 206 Partial Content
Content-Range: bytes 0-1023/146515
Content-Length: 1024

Status codes seen with it

2

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