# A0 33 44 A0 A0 — File format magic numbers

For A0 33 44 A0 A0, offset is 0x61819; extension is d81; format is Commodore 64 1581 disk image (D81 format), recorded from its source on 2026-08-03.

- **Hex signature:** A0 33 44 A0 A0 _(unconfirmed — we could not tie this to the quote below)_
- **Offset:** 0x61819 _(unconfirmed — we could not tie this to the quote below)_
- **Extension:** d81
- **Format:** Commodore 64 1581 disk image (D81 format)

## What the source says

> d81 | <https://en.wikipedia.org/wiki/Commodore_64> Commodore 64 1581 disk image (D81 format)

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-08-03. Review by: 2027-08-03.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).