# 21 2D 31 53 4C 4F 42 1F — File format magic numbers

For 21 2D 31 53 4C 4F 42 1F, offset is 21; extension is slob; format is Slob (sorted list of Object storages ) is a read-only, compressed data store with dictionary-like interface, verified against its source on 2026-08-03.

- **Hex signature:** 21 2D 31 53 4C 4F 42 1F
- **Offset:** 21
- **Extension:** slob
- **Format:** Slob (sorted list of Object storages ) is a read-only, compressed data store with dictionary-like interface

## What the source says

> /wiki/Windows_Imaging_Format> Windows Imaging Format file | 21 2D 31 53 4C 4F 42 1F | !-1SLOB␟ | 0 | slob | Slob (sorted list of <https://en.wikipedia.org/wiki/Object_storage> Object storages ) is a read-only, compressed data store with dictionary-like interface [ 94 ] | AC ED | ¬í | 0 | | Serialized Java Data [ 95 ] | 43 72 65 61 74 69 76 65 20 56 6F 69 63

## 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/).