All TLDs / .hbo

What is .hbo?

The short answer
.hbo is a brand top-level domain, operated by HBO Registry Services, Inc. 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
HBO Registry Services, Inc

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

Is .hbo a real domain extension?

Yes — .hbo 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 .hbo?

.hbo is operated by HBO Registry Services, Inc., per the IANA root database.

What is .hbo used for?

.hbo is a dot-brand registry — it's reserved for HBO Registry Services, Inc. and isn't used for third-party websites.

Can anyone register a .hbo domain?

No. .hbo 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.