# ASTM E57 3D file format — file signature 41 53 54 4d 2d 45 35 37 at offset 0

For ASTM E57 3D file format, hex signature is 41 53 54 4d 2d 45 35 37; offset is 0; extension is e57, verified against its source on 2026-09-22.

- **Hex signature:** 41 53 54 4d 2d 45 35 37 _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** e57 _(verified: appears in the quote below)_
- **Format:** ASTM E57 3D file format _(verified: appears in the quote below)_

## What the source says

> 41 53 54 4d 2d 45 35 37 | ASTM-E57 | 0 | e57 | ASTM E57 3D file format |

## Source

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

Last verified: 2026-09-22. Review by: 2027-09-22.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).