---
title: ".swiss"
url: "https://help.internetx.com/en/api/epp-swiss/"
lang: "en"
section: "API reference — EPP API"
breadcrumb: "API reference > EPP extensions > TLD extensions"
updated: "2024-04-18"
---

# .swiss

## Contact extensions

| Keyword | Occurs | Type | Format | Description |
| --- | --- | --- | --- | --- |
| enterpriseId |  | string |  | For companies:<br>Company-ID pursuant to UID/IDE/IDI regulations for .swiss domains.<br>Exact wording<br>• in German UID "Unternehmens-ID",<br>• in French IDE "Numéro d’identification des entreprises"<br>• in Italian IDI "Numero d’identificazione delle imprese".<br>For natural persons:<br>• Swiss social security number (OASI / AHV / AVS) |
| intendedUse |  | string |  | Describes what the domain will be used for. |

## XML example

```
<extension>
	<swiss:contact xmlns:swiss="urn:org:domainrobot:ns:contact:swiss-1.0">
		<swiss:enterpriseId>123456789</swiss:enterpriseId>
		<swiss:intendedUse>E-Commerce Shop</swiss:intendedUse>
 	</swiss:contact>
</extension>
```