Yes — seichi.fans has IPv6.

Has both IPv4 (A) and IPv6 (AAAA) addresses.

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 seichi.fans has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3030::ac43:a9ef answers · 443✓ 2606:4700:3035::6815:4f67 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. route2.mx.cloudflare.net ✓route1.mx.cloudflare.net ✓route3.mx.cloudflare.net ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. aleena.ns.cloudflare.com ✓andy.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://seichi.fans/ via 2606:4700:3030::ac43:a9ef → 302https://late-pine-773a.cloudflareaccess.com/cdn-cgi/access/login/seichi.fans?kid=82ce1c4acdac21b0318d15bfe3b624bf6cf5ab5d34c4b1c7fd1e2d525d600468&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.av7JDOa-HRyKkuHV0_pseb3X90tlZQJFXNI8W-xIq6KCzJrhEriKUWMvMEzEagLfTGQbLyct7tnbB2wiydboVjK_z7pHEUWxnCJfw7eFUIV1kaGgckM3KsNeRI_UF984doHwuZ1lBmU5zoTqu7XAO0HnvDwH_2_MO59xu9Ia_zTEejKrmAhre0HzKZcIkN-wUBWd-ZNKFL9s4V43kBtcXLES5gMOUCI7qEYsobnkHXDRqvVcanccs6lBfr8aeNQ9sxYLR9k9Hhhb6h22hQc5N8EiAjofjQJ8O8Wbz1vvH5X_73SQTUcPkIs54k-yxp_NA5EBshSH_NJqynNyIEfH8g&redirect_url=%2F via 2606:4700:300a::6813:c21d → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/seichi.fans.svg)](https://aaaa.bot/seichi.fans)

Check again

seichi.fans Has IPv6

A (IPv4)	104.21.79.103 172.67.169.239
AAAA (IPv6)	2606:4700:3030::ac43:a9ef 2606:4700:3035::6815:4f67

Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).

Copy the evidence — a citation-ready record of this measurement

IPv6 measurement: seichi.fans
Measured 2026-11-10 07:24:20 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.79.103, 172.67.169.239
AAAA (IPv6): 2606:4700:3030::ac43:a9ef, 2606:4700:3035::6815:4f67

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: seichi.fans has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3030::ac43:a9ef: answers (TCP 443)
    2606:4700:3035::6815:4f67: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server has an AAAA record.
- Nameservers have IPv6: 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://seichi.fans/ via 2606:4700:3030::ac43:a9ef -> HTTP 302, certificate: valid
    https://late-pine-773a.cloudflareaccess.com/cdn-cgi/access/login/seichi.fans?kid=82ce1c4acdac21b0318d15bfe3b624bf6cf5ab5d34c4b1c7fd1e2d525d600468&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.av7JDOa-HRyKkuHV0_pseb3X90tlZQJFXNI8W-xIq6KCzJrhEriKUWMvMEzEagLfTGQbLyct7tnbB2wiydboVjK_z7pHEUWxnCJfw7eFUIV1kaGgckM3KsNeRI_UF984doHwuZ1lBmU5zoTqu7XAO0HnvDwH_2_MO59xu9Ia_zTEejKrmAhre0HzKZcIkN-wUBWd-ZNKFL9s4V43kBtcXLES5gMOUCI7qEYsobnkHXDRqvVcanccs6lBfr8aeNQ9sxYLR9k9Hhhb6h22hQc5N8EiAjofjQJ8O8Wbz1vvH5X_73SQTUcPkIs54k-yxp_NA5EBshSH_NJqynNyIEfH8g&redirect_url=%2F via 2606:4700:300a::6813:c21d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/rXWtPFUf0j

Permanent link: aaaa.bot/r/rXWtPFUf0j · How we measure

Checked 2026-11-10 07:24:20 UTC. Full DNS report: dns.pizza/domain/seichi.fans · Age, certificate and blocklists: how.is/seichi.fans · JSON: /api/v1/seichi.fans