.hbo
.hbo is a brand extension, run by HBO Registry Services, Inc. since 2016. Only HBO Registry Services, Inc., its affiliates and trademark licensees can register .hbo names; they are not for sale to the public.
| Type | Brand |
|---|---|
| Registry operator | HBO Registry Services, Inc. |
| Who can register | Brand owner only Brand extension: only the registry operator, its affiliates and trademark licensees register names. |
| In the root zone since | 14 August 2016 |
| DNSSEC | Signed |
| RDAP server | https://rdap.nic.hbo/ |
| WHOIS server | None listed |
| IANA record | iana.org/domains/root/db/hbo |
Look up a .hbo domain
The .hbo registry publishes registration data over RDAP. The free domain report reads it and shows a .hbo domain's registrar, dates, status and DNS in one place. For the raw record, use the WHOIS lookup.
New to extensions? The guide to how domain extensions work covers generic, country-code and brand extensions. For who sells extensions in general, see the list of domain registrars.
Sources: the IANA root zone database and the ICANN list of generic extensions (refreshed 2026-10-24). Something out of date? Tell us.
Frequently asked questions
Who runs the .hbo extension?
HBO Registry Services, Inc. is the registry operator for .hbo. The registry keeps the list of every .hbo name; registrars sell the names to the public.
Can anyone register a .hbo domain?
Only HBO Registry Services, Inc., its affiliates and trademark licensees can register .hbo names; they are not for sale to the public.
When was .hbo created?
.hbo was added to the DNS root zone on 14 August 2016, according to IANA.
How do I look up who owns a .hbo domain?
The .hbo registry publishes registration data over RDAP at https://rdap.nic.hbo/. The free domain report on lemon.domains reads it for you and shows the registrar, dates and status.
Is .hbo signed with DNSSEC?
Yes. The .hbo zone is signed, so a .hbo domain can turn on DNSSEC once its registrar adds a DS record.