# 66 4C 61 43 — File format magic numbers

For 66 4C 61 43, offset is 0; extension is flac; format is FLAC, recorded from its source on 2026-08-03.

- **Hex signature:** 66 4C 61 43 _(unconfirmed — we could not tie this to the quote below)_
- **Offset:** 0
- **Extension:** flac
- **Format:** FLAC

## What the source says

> fLaC", the FLAC stream marker in ASCII, meaning byte 0 of the stream is 0x66, followed by 0x4C 0x61 0x43

## 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/).