All TLDs / .jcb

What is .jcb?

The short answer
.jcb is a brand top-level domain, operated by JCB Co., Ltd. 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
JCB Co., Ltd

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

Is .jcb a real domain extension?

Yes — .jcb 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 .jcb?

.jcb is operated by JCB Co., Ltd., per the IANA root database.

What is .jcb used for?

.jcb is a dot-brand registry — it's reserved for JCB Co., Ltd. and isn't used for third-party websites.

Can anyone register a .jcb domain?

No. .jcb 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.