All TLDs / .kddi

What is .kddi?

The short answer
.kddi is a brand top-level domain, operated by KDDI CORPORATION. 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
KDDI CORPORATION

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

Is .kddi a real domain extension?

Yes — .kddi 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 .kddi?

.kddi is operated by KDDI CORPORATION, per the IANA root database.

What is .kddi used for?

.kddi is a dot-brand registry — it's reserved for KDDI CORPORATION and isn't used for third-party websites.

Can anyone register a .kddi domain?

No. .kddi 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.