Apache ORC (Optimized Row Columnar) file format — file signature 4F 52 43 at offset 0

For Apache ORC (Optimized Row Columnar) file format, hex signature is 4F 52 43; offset is 0; extension is orc, verified against its source on 2026-09-22.

Hex signature: 4F 52 43 verified
Offset: 0 verified
Extension: orc verified
Format: Apache ORC (Optimized Row Columnar) file format verified

Sourceen.wikipedia.org

Verified2026-09-22

Review by2027-09-22

DatasetFile format magic numbers

What the source says

4F 52 43 | ORC | 0 | orc | Apache ORC (Optimized Row Columnar) file format |

— en.wikipedia.org, retrieved 2026-09-22

Source

en.wikipedia.orghttps://en.wikipedia.org/wiki/List_of_file_signatures

Last verified against source: 2026-09-22. Due for re-check by 2027-09-22. This page as Markdown · OKF bundle · full dataset as JSON.