Lotus 1-2-3 spreadsheet (v4, v5) file — file signature 00 00 1A 00 02 10 04 00 00 00 00 00 at offset 0

For Lotus 1-2-3 spreadsheet (v4, v5) file, hex signature is 00 00 1A 00 02 10 04 00 00 00 00 00; offset is 0; extension is wk4 wk5, verified against its source on 2026-09-22.

What the source says

00 00 1A 00 02 10 04 00 00 00 00 00 | ␀␀␚␀␂␊␄␀␀␀␀␀ | 0 | wk4 wk5 | Lotus 1-2-3 spreadsheet (v4, v5) file |

— 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.