.open
.open is a brand extension, run by American Express Travel Related Services Company, Inc. since 2016. Only American Express Travel Related Services Company, Inc., its affiliates and trademark licensees can register .open names; they are not for sale to the public.
| Type | Brand |
|---|---|
| Registry operator | American Express Travel Related Services Company, 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 | 8 August 2016 |
| DNSSEC | Signed |
| RDAP server | https://rdap.nic.open/ |
| WHOIS server | whois.nic.open |
| IANA record | iana.org/domains/root/db/open |
Registrars that sell .open
| Integrated |
From the list of domain registrars. Other registrars may sell it too.
Look up a .open domain
The .open registry publishes registration data over RDAP. The free domain report reads it and shows a .open domain's registrar, dates, status and DNS in one place. For the raw record, use the WHOIS lookup.
More extensions from American Express Travel Related Services Company, Inc.
| .americanexpress | Brand · 2016 |
| .amex | Brand · 2016 |
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 Something out of date?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 .open extension?
American Express Travel Related Services Company, Inc. is the registry operator for .open. The registry keeps the list of every .open name; registrars sell the names to the public.
Can anyone register a .open domain?
Only American Express Travel Related Services Company, Inc., its affiliates and trademark licensees can register .open names; they are not for sale to the public.
When was .open created?
.open was added to the DNS root zone on 8 August 2016, according to IANA.
How do I look up who owns a .open domain?
The .open registry publishes registration data over RDAP at https://rdap.nic.open/ and over WHOIS at whois.nic.open. The free domain report on lemon.domains reads it for you and shows the registrar, dates and status.
Is .open signed with DNSSEC?
Yes. The .open zone is signed, so a .open domain can turn on DNSSEC once its registrar adds a DS record.