Yes — haokuai.top has IPv6.

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

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 haokuai.top has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3030::ac43:8085 answers · 443✓ 2606:4700:3032::6815:12d answers · 443	yes
www over IPv6 www.haokuai.top has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::6815:12d answers · 443✓ 2606:4700:3030::ac43:8085 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. eforward1.registrar-servers.com ✗eforward2.registrar-servers.com ✗eforward3.registrar-servers.com ✗eforward4.registrar-servers.com ✗eforward5.registrar-servers.com ✗	no
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. dns1.registrar-servers.com ✓dns2.registrar-servers.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
haokuai.top didn't complete an HTTPS request over IPv6 (ERR_SSL_SSL/TLS_ALERT_HANDSHAKE_FAILURE).

https://haokuai.top/ via 2606:4700:3030::ac43:8085 · ERR_SSL_SSL/TLS_ALERT_HANDSHAKE_FAILURE

What's keeping haokuai.top from an A

Mail servers without IPv6
eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com, eforward4.registrar-servers.com, eforward5.registrar-servers.com have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

haokuai.top Has IPv6

A (IPv4)	172.67.128.133 104.21.1.45
AAAA (IPv6)	2606:4700:3030::ac43:8085 2606:4700:3032::6815:12d

www.haokuai.top Has IPv6

Alias of	fallback.ka8.ai
A (IPv4)	172.67.128.133 104.21.1.45
AAAA (IPv6)	2606:4700:3032::6815:12d 2606:4700:3030::ac43:8085

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: haokuai.top
Measured 2026-11-07 06:28:17 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.128.133, 104.21.1.45
AAAA (IPv6): 2606:4700:3030::ac43:8085, 2606:4700:3032::6815:12d
www AAAA:    2606:4700:3032::6815:12d, 2606:4700:3030::ac43:8085

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: haokuai.top has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3030::ac43:8085: answers (TCP 443)
    2606:4700:3032::6815:12d: answers (TCP 443)
- www over IPv6: www.haokuai.top has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::6815:12d: answers (TCP 443)
    2606:4700:3030::ac43:8085: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers 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): haokuai.top didn't complete an HTTPS request over IPv6 (ERR_SSL_SSL/TLS_ALERT_HANDSHAKE_FAILURE).
    https://haokuai.top/ via 2606:4700:3030::ac43:8085 (ERR_SSL_SSL/TLS_ALERT_HANDSHAKE_FAILURE)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/Peu6DOZdOu

Permanent link: aaaa.bot/r/Peu6DOZdOu · How we measure

Checked 2026-11-07 06:28:17 UTC. Full DNS report: dns.pizza/domain/haokuai.top · Age, certificate and blocklists: how.is/haokuai.top · JSON: /api/v1/haokuai.top