# 21 42 44 4E — File format magic numbers

For 21 42 44 4E, offset is 21; extension is pst; format is Microsoft Outlook Personal Storage Table file, recorded from its source on 2026-08-03.

- **Hex signature:** 21 42 44 4E
- **Offset:** 21
- **Extension:** pst
- **Format:** Microsoft Outlook Personal Storage Table file _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> ikipedia.org/wiki/Windows_Registry> Windows Registry file | 21 42 44 4E | !BDN | 0 | pst | Microsoft Outlook <https://en.wikipedia.org/wiki/Personal_Storage_Table> Personal Storage Table file | 44 52 41 43 4F | DRACO | 0 | drc | 3D model compressed with Google Draco [ 88 ] | 47 52 49 42 | GRIB | 0 | grib grib2 | Gridded data (commonly weather observations or

## 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/).