# 89 48 44 46 0D 0A 1A 0A — File format magic numbers

For 89 48 44 46 0D 0A 1A 0A, offset is 0, 512, 1024, 2048, ; extension is hdf5 h5; format is Data stored in version 5 of the <https://en.wikipedia.org/wiki/Hierarchical_Data_Format> Hierarchical Data Format , recorded from its source on 2026-08-03.

- **Hex signature:** 89 48 44 46 0D 0A 1A 0A _(unconfirmed — we could not tie this to the quote below)_
- **Offset:** 0, 512, 1024, 2048, ... _(unconfirmed — we could not tie this to the quote below)_
- **Extension:** hdf5 h5 _(unconfirmed — we could not tie this to the quote below)_
- **Format:** Data stored in version 5 of the <https://en.wikipedia.org/wiki/Hierarchical_Data_Format> Hierarchical Data Format .

## What the source says

> Data stored in version 5 of the <https://en.wikipedia.org/wiki/Hierarchical_Data_Format> Hierarchical Data Format .

## 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/).