---
type: lookup
id: d81-a0-33-44-a0-a0
asset: file-format-signatures
title: "A0 33 44 A0 A0 — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "d81 | <https://en.wikipedia.org/wiki/Commodore_64> Commodore 64 1581 disk image (D81 format)"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "A0 33 44 A0 A0"
offset: "0x61819"
extension: "d81"
format: "Commodore 64 1581 disk image (D81 format)"
unverified_fields: hex_signature, offset
---
**Hex signature:** A0 33 44 A0 A0

**Offset:** 0x61819

**Extension:** d81

**Format:** Commodore 64 1581 disk image (D81 format)

> 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>