All TLDs / .fresenius

What is .fresenius?

The short answer
.fresenius is a brand top-level domain, operated by Fresenius Immobilien-Verwaltungs-GmbH. It's a “dot-brand” registry (ICANN Spec 13) — reserved for the operator's own use, so it isn't open for the public to register. It's live in the official IANA DNS root zone.
Type
Brand (dot-brand)
Registration
Closed (brand)
In DNS root
Yes
Operator
Fresenius Immobilien-Verwaltungs-GmbH

Source: IANA root zone database, checked October 18, 2026.

Is .fresenius a real domain extension?

Yes — .fresenius is a real top-level domain. It's present in the official IANA DNS root zone, which is the authoritative list of every live TLD on the internet.

Who runs .fresenius?

.fresenius is operated by Fresenius Immobilien-Verwaltungs-GmbH, per the IANA root database.

What is .fresenius used for?

.fresenius is a dot-brand registry — it's reserved for Fresenius Immobilien-Verwaltungs-GmbH and isn't used for third-party websites.

Can anyone register a .fresenius domain?

No. .fresenius is a closed brand registry, so it isn't available for public registration. A registrar search will confirm the current policy for any specific name.