Yes — haoyunyun.top has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 haoyunyun.top has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::ac43:a8c8 answers · 443✓ 2606:4700:3034::6815:36b2 answers · 443	yes
www over IPv6 www.haoyunyun.top has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::6815:36b2 answers · 443✓ 2606:4700:3031::ac43:a8c8 answers · 443	yes
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. natasha.ns.cloudflare.com ✓vick.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Answered over IPv6 with a server error (HTTP 520) — can't tell whether that's specific to IPv6.

https://haoyunyun.top/ via 2606:4700:3031::ac43:a8c8 → 520

Nothing keeping you from an A

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

Check again

haoyunyun.top Has IPv6

A (IPv4)	104.21.54.178 172.67.168.200
AAAA (IPv6)	2606:4700:3031::ac43:a8c8 2606:4700:3034::6815:36b2

www.haoyunyun.top Has IPv6

A (IPv4)	104.21.54.178 172.67.168.200
AAAA (IPv6)	2606:4700:3034::6815:36b2 2606:4700:3031::ac43:a8c8

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: haoyunyun.top
Measured 2026-10-31 16:01:26 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.54.178, 172.67.168.200
AAAA (IPv6): 2606:4700:3031::ac43:a8c8, 2606:4700:3034::6815:36b2
www AAAA:    2606:4700:3034::6815:36b2, 2606:4700:3031::ac43:a8c8

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: haoyunyun.top has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::ac43:a8c8: answers (TCP 443)
    2606:4700:3034::6815:36b2: answers (TCP 443)
- www over IPv6: www.haoyunyun.top has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::6815:36b2: answers (TCP 443)
    2606:4700:3031::ac43:a8c8: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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): Answered over IPv6 with a server error (HTTP 520) — can't tell whether that's specific to IPv6.
    https://haoyunyun.top/ via 2606:4700:3031::ac43:a8c8 -> HTTP 520, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/n-plkS4PmW

Permanent link: aaaa.bot/r/n-plkS4PmW · How we measure

Checked 2026-10-31 16:01:26 UTC. Full DNS report: dns.pizza/domain/haoyunyun.top · JSON: /api/v1/haoyunyun.top