# 52 49 46 46 ?? ?? ?? ?? 43 44 44 41 — File format magic numbers

For 52 49 46 46 ?? ?? ?? ?? 43 44 44 41, offset is 0; extension is cda; format is .cda file, recorded from its source on 2026-08-03.

- **Hex signature:** 52 49 46 46 ?? ?? ?? ?? 43 44 44 41 _(unconfirmed — we could not tie this to the quote below)_
- **Offset:** 0 _(unconfirmed — we could not tie this to the quote below)_
- **Extension:** cda
- **Format:** .cda file

## What the source says

> cda | <https://en.wikipedia.org/wiki/.cda_file> .cda file

## 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/).