Every extension, oldest first
21k
We have seen 21k registered in 65 extensions. The oldest is 21k.com, registered on 16 Oct 1998; the newest, 21k.agency, on 13 Oct 2026.
Checking which of them answer in DNS today…
- Seen in
- 65 extensions
- Oldest
- 1998 21k.com
- Newest
- 2026 21k.agency
- In DNS today
- … checking
Registered in
| Year | Domain | Registered | Expires | Registrar | Details | DNS today | Screenshot |
|---|---|---|---|---|---|---|---|
| 1998 | 21k.com | 16 Oct 1998 | Oct 2026 (passed) | GoDaddy.com, LLC | 16 Oct 1998 expiry Oct 2026 (passed) | checking… |  |
| 2004 | 21k.org | 8 Sep 2004 | Sep 2026 (passed) | GoDaddy.com, LLC | 8 Sep 2004 expiry Sep 2026 (passed) | checking… |  |
| 2005 | 21k.net | 19 Mar 2005 | Mar 2027 | NameSilo, LLC | 19 Mar 2005 expires Mar 2027 | checking… | |
| 2006 | 21k.ru | 25 Sep 2006 | — | RU-CENTER-RU | 25 Sep 2006 | checking… |  |
| 2008 | 21k.ca | 23 Jul 2008 | Jul 2027 | Namespro Solutions Inc. | 23 Jul 2008 expires Jul 2027 | checking… | |
| 2011 | 21k.cz | 4 Jan 2011 | Jan 2027 | REG-WEDOS | 4 Jan 2011 expires Jan 2027 | checking… |  |
| 2013 | 21k.com.br | 19 Aug 2013 | — | — | 19 Aug 2013 | checking… |  |
| 2013 | 21k.ar | 20 Aug 2013 | Mar 2027 | nicar | 20 Aug 2013 expires Mar 2027 | checking… |  |
| 2016 | 21k.it | 14 Jul 2016 | — | — | 14 Jul 2016 | checking… | |
| 2017 | 21k.club | 18 Mar 2017 | Mar 2028 | Realtime Register B.V. | 18 Mar 2017 expires Mar 2028 | checking… |  |
| 2020 | 21k.nl | 31 Jan 2020 | — | — | 31 Jan 2020 | checking… | |
| 2020 | 21k.live | 9 Dec 2020 | Dec 2026 | GoDaddy.com, LLC | 9 Dec 2020 expires Dec 2026 | checking… |  |
| 2023 | 21k.cl | 5 Oct 2023 | Oct 2026 (passed) | — | 5 Oct 2023 expiry Oct 2026 (passed) | checking… |  |
| 2023 | 21k.online | 28 Nov 2023 | Nov 2026 | Tucows Domains Inc. | 28 Nov 2023 expires Nov 2026 | checking… |  |
| 2024 | 21k.cc | 20 Jul 2024 | Jul 2026 (passed) | Gname.com Pte. Ltd. | 20 Jul 2024 expiry Jul 2026 (passed) | checking… |  |
| 2024 | 21k.hu | 19 Nov 2024 | — | — | 19 Nov 2024 | checking… |  |
| 2025 | 21k.xyz | 26 Feb 2025 | Feb 2027 | Unstoppable Domains, Inc. | 26 Feb 2025 expires Feb 2027 | checking… |  |
| 2025 | 21k.site | 26 Mar 2025 | Mar 2027 | GMO Internet Group, Inc. d/b/… | 26 Mar 2025 expires Mar 2027 | checking… | |
| 2025 | 21k.mepending delete on 15 Jul 2026 | 20 May 2025 | May 2026 (passed) | Dynadot Inc | 20 May 2025 expiry May 2026 (passed) | checking… | |
| 2025 | 21k.tools | 8 Jul 2025 | Jul 2026 (passed) | GoDaddy.com, LLC | 8 Jul 2025 expiry Jul 2026 (passed) | checking… |  |
| 2025 | 21k.mobi | 27 Jul 2025 | Jul 2026 (passed) | Eranet International Limited | 27 Jul 2025 expiry Jul 2026 (passed) | checking… |  |
| 2025 | 21k.shop | 31 Aug 2025 | Aug 2026 (passed) | GoDaddy.com LLC | 31 Aug 2025 expiry Aug 2026 (passed) | checking… |  |
| 2025 | 21k.fi | 17 Sep 2025 | — | — | 17 Sep 2025 | checking… |  |
| 2025 | 21k.run | 28 Oct 2025 | Oct 2026 | InterNetX GmbH | 28 Oct 2025 expires Oct 2026 | checking… |  |
| 2025 | 21k.info | 20 Nov 2025 | Nov 2026 | CommuniGal Communication Ltd. | 20 Nov 2025 expires Nov 2026 | checking… |  |
| 2025 | 21k.ai | 19 Dec 2025 | Dec 2027 | GoDaddy.com, LLC | 19 Dec 2025 expires Dec 2027 | checking… |  |
| 2025 | 21k.app | 19 Dec 2025 | Dec 2026 | GoDaddy.com, LLC | 19 Dec 2025 expires Dec 2026 | checking… |  |
| 2025 | 21k.io | 19 Dec 2025 | Dec 2026 | GoDaddy.com, LLC | 19 Dec 2025 expires Dec 2026 | checking… |  |
| 2026 | 21k.click | 20 Feb 2026 | Feb 2027 | Dynadot, LLC | 20 Feb 2026 expires Feb 2027 | checking… |  |
| 2026 | 21k.store | 8 May 2026 | May 2027 | Squarespace Domains LLC | 8 May 2026 expires May 2027 | checking… |  |
| 2026 | 21k.us | 17 May 2026 | May 2027 | Dynadot Inc | 17 May 2026 expires May 2027 | checking… | |
| 2026 | 21k.in | 4 Jun 2026 | Jun 2027 | GoDaddy | 4 Jun 2026 expires Jun 2027 | checking… |  |
| 2026 | 21k.best | 14 Jun 2026 | Jun 2027 | Dynadot Inc | 14 Jun 2026 expires Jun 2027 | checking… |  |
| 2026 | 21k.bet | 18 Jun 2026 | Jun 2027 | Dynadot Inc | 18 Jun 2026 expires Jun 2027 | checking… |  |
| 2026 | 21k.gold | 17 Aug 2026 | Aug 2027 | Spaceship, Inc. | 17 Aug 2026 expires Aug 2027 | checking… | |
| 2026 | 21k.space | 25 Sep 2026 | Sep 2027 | Porkbun LLC | 25 Sep 2026 expires Sep 2027 | checking… |  |
| 2026 | 21k.koeln | 5 Oct 2026 | Oct 2027 | PSI-USA, Inc. dba Domain Robot | 5 Oct 2026 expires Oct 2027 | checking… | |
| 2026 | 21k.agency | 13 Oct 2026 | Oct 2028 | GoDaddy.com, LLC | 13 Oct 2026 expires Oct 2028 | checking… |  |
| — | 21k.bid | no date on record | — | — | no date on record | checking… |  |
| — | 21k.buzz | no date on record | — | — | no date on record | checking… |  |
| — | 21k.casino | no date on record | — | — | no date on record | checking… |  |
| — | 21k.ch | no date on record | — | — | no date on record | checking… | |
| — | 21k.cn | no date on record | — | 厦门易名科技股份有限公司 | no date on record | checking… | |
| — | 21k.co | no date on record | — | — | no date on record | checking… |  |
| — | 21k.co.uk | no date on record | — | — | no date on record | checking… | |
| — | 21k.com.cn | no date on record | — | — | no date on record | checking… | |
| — | 21k.com.mx | no date on record | Jul 2027 | Namecheap, Inc. | no date on record expires Jul 2027 | checking… | |
| — | 21k.de | no date on record | — | — | no date on record | checking… | |
| — | 21k.digital | no date on record | — | — | no date on record | checking… |  |
| — | 21k.dk | no date on record | — | Simply.com A/S | no date on record | checking… |  |
| — | 21k.education | no date on record | — | — | no date on record | checking… | |
| — | 21k.ee | no date on record | — | — | no date on record | checking… |  |
| — | 21k.expert | no date on record | — | — | no date on record | checking… | |
| — | 21k.group | no date on record | — | — | no date on record | checking… | |
| — | 21k.ing | no date on record | — | — | no date on record | checking… | |
| — | 21k.my | no date on record | — | — | no date on record | checking… | |
| — | 21k.ph | no date on record | — | — | no date on record | checking… |  |
| — | 21k.pro | no date on record | — | — | no date on record | checking… |  |
| — | 21k.pt | no date on record | — | — | no date on record | checking… |  |
| — | 21k.ro | no date on record | — | — | no date on record | checking… |  |
| — | 21k.school | no date on record | — | — | no date on record | checking… | |
| — | 21k.software | no date on record | — | — | no date on record | checking… |  |
| — | 21k.technology | no date on record | — | — | no date on record | checking… | |
| — | 21k.top | no date on record | — | — | no date on record | checking… |  |
| — | 21k.world | no date on record | — | — | no date on record | checking… |  |
Seen before, not in DNS now
These names were registered when we last saw them, but they have no nameservers today. They may have lapsed, or be registered and parked without DNS. Not in DNS does not mean free: only the registry can say that.
| Year | Domain | Registered | Expires | Registrar | Details | DNS today | Screenshot |
|---|
How to read this
Registered is the creation date in the registry's own record (WHOIS or RDAP) when we last looked. A name that lapsed and was registered again shows its newest registration.
No date on record means we do not have the date yet, or the registry does not publish one. Missing years fill in over time, and so do registrations we have not seen yet.
Not in DNS means the name has no nameservers today. It never means the name is free to register: only a registry can tell you that.