All TLDs / .aco

What is .aco?

The short answer
.aco is a brand top-level domain, operated by ACO Severin Ahlmann GmbH & Co. KG. 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
ACO Severin Ahlmann GmbH & Co. KG

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

Is .aco a real domain extension?

Yes — .aco 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 .aco?

.aco is operated by ACO Severin Ahlmann GmbH & Co. KG, per the IANA root database.

What is .aco used for?

.aco is a dot-brand registry — it's reserved for ACO Severin Ahlmann GmbH & Co. KG and isn't used for third-party websites.

Can anyone register a .aco domain?

No. .aco 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.