---
id: "at_firmenbuchnummer"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["companies"]
country: ["AT"]
langs: ["common"]
quality: 80
url: "http://registry.apicrafter.io/datatype/at_firmenbuchnummer"
---

# Austrian company register number (Firmenbuchnummer) (`at_firmenbuchnummer`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Number of a company in the Austrian commercial register: digits followed by a lowercase check letter, such as 123456a. It is often written with the prefix FN.

- Personal data (PII): no
- Categories: Companies/business/organizations (companies)
- Countries: Austria (AT)
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
^[1-9][0-9]{4,5}[a-z]$
```

## Examples

- `93363z` — OMV
- `76023z` — Verbund

## Mappings

- stdnum: `at.businessid`
- wikidata: `P5285`

## Sources

- wikipedia: <https://de.wikipedia.org/wiki/Firmenbuch>
- wikidata: <https://www.wikidata.org/wiki/Property:P5285>

## Quality

Score 80/100. Missing: negative example, translation, detector coverage.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/at_firmenbuchnummer.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/AT/companies/at_firmenbuchnummer.yaml>