Every extension, oldest first
seiun
We have seen seiun registered in 26 extensions. The oldest is seiun.net, registered on 13 Jan 2000; the newest, seiun.com.br, on 21 Oct 2026.
Checking which of them answer in DNS today…
- Seen in
- 26 extensions
- Oldest
- 2000 seiun.net
- Newest
- 2026 seiun.com.br
- In DNS today
- … checking
Registered in
| Year | Domain | Registered | Expires | Registrar | Details | DNS today | Screenshot |
|---|---|---|---|---|---|---|---|
| 2000 | seiun.net | 13 Jan 2000 | Jan 2027 | Japan Registry Services Co.,L… | 13 Jan 2000 expires Jan 2027 | checking… |  |
| 2002 | seiun.com | 30 Apr 2002 | Apr 2026 (passed) | Megazone Corp., dba HOSTING.KR | 30 Apr 2002 expiry Apr 2026 (passed) | checking… | |
| 2009 | seiun.biz | 17 Jun 2009 | Jun 2028 | GMO Internet, Inc. d/b/a Onam… | 17 Jun 2009 expires Jun 2028 | checking… |  |
| 2010 | seiun.org | 2 Dec 2010 | Dec 2026 | Japan Registry Services Co.,L… | 2 Dec 2010 expires Dec 2026 | checking… |  |
| 2019 | seiun.co.jp | 3 Sep 2019 | Sep 2027 | — | 3 Sep 2019 expires Sep 2027 | checking… |  |
| 2020 | seiun.tokyo | 10 Nov 2020 | Nov 2030 | GMO Internet Group, Inc. | 10 Nov 2020 expires Nov 2030 | checking… |  |
| 2021 | seiun.host | 5 Jan 2021 | Jan 2031 | Alibaba Cloud Computing Ltd.… | 5 Jan 2021 expires Jan 2031 | checking… | |
| 2021 | seiun.io | 20 Aug 2021 | Aug 2026 (passed) | Spaceship, Inc. | 20 Aug 2021 expiry Aug 2026 (passed) | checking… |  |
| 2024 | seiun.jp | 30 Jun 2024 | Jun 2027 | — | 30 Jun 2024 expires Jun 2027 | checking… | |
| 2025 | seiun.studio | 26 Jan 2025 | Jan 2027 | Squarespace Domains II LLC | 26 Jan 2025 expires Jan 2027 | checking… |  |
| 2025 | seiun.fr | 3 Jun 2025 | Jun 2027 | Hosting Concepts B.V. d/b/a O… | 3 Jun 2025 expires Jun 2027 | checking… | |
| 2025 | seiun.ovh | 8 Jun 2025 | Jun 2035 | OVH | 8 Jun 2025 expires Jun 2035 | checking… |  |
| 2025 | seiun.online | 12 Jun 2025 | Jun 2026 (passed) | XServer, Inc. | 12 Jun 2025 expiry Jun 2026 (passed) | checking… | |
| 2025 | seiun.info | 7 Jul 2025 | Jul 2026 (passed) | GMO Internet Group, Inc. d/b/… | 7 Jul 2025 expiry Jul 2026 (passed) | checking… | |
| 2025 | seiun.cloud | 31 Oct 2025 | Oct 2026 (passed) | DNSPod, Inc. | 31 Oct 2025 expiry Oct 2026 (passed) | checking… | |
| 2025 | seiun.site | 8 Dec 2025 | Dec 2026 | Name.com, Inc. | 8 Dec 2025 expires Dec 2026 | checking… | |
| 2026 | seiun.in | 4 Feb 2026 | Feb 2027 | HOSTINGER operations, UAB | 4 Feb 2026 expires Feb 2027 | checking… |  |
| 2026 | seiun.club | 9 Mar 2026 | Mar 2027 | OVH sas | 9 Mar 2026 expires Mar 2027 | checking… | |
| 2026 | seiun.top | 11 Jul 2026 | Jul 2027 | DNSPod, Inc. | 11 Jul 2026 expires Jul 2027 | checking… |  |
| 2026 | seiun.me | 8 Aug 2026 | Aug 2027 | Cloudflare, Inc. | 8 Aug 2026 expires Aug 2027 | checking… |  |
| 2026 | seiun.cc | 23 Sep 2026 | Sep 2029 | Alibaba Cloud Computing Ltd.… | 23 Sep 2026 expires Sep 2029 | checking… |  |
| 2026 | seiun.com.br | 21 Oct 2026 | Oct 2027 | — | 21 Oct 2026 expires Oct 2027 | checking… |  |
| — | seiun.cn | no date on record | — | — | no date on record | checking… | |
| — | seiun.co | no date on record | — | — | no date on record | checking… |  |
| — | seiun.co.uk | no date on record | — | — | no date on record | checking… | |
| — | seiun.kiwi | 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.