Yes — nhacaitangtien.vin has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 nhacaitangtien.vin has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::6815:2beb answers · 443✓ 2606:4700:3031::ac43:bc7d answers · 443	yes
www over IPv6 www.nhacaitangtien.vin has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::6815:2beb answers · 443✓ 2606:4700:3031::ac43:bc7d 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. rocky.ns.cloudflare.com ✓zita.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Answered over IPv6 with a server error (HTTP 530) — can't tell whether that's specific to IPv6.

https://nhacaitangtien.vin/ via 2606:4700:3034::6815:2beb → 530

Nothing keeping you from an A

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

Check again

nhacaitangtien.vin Has IPv6

A (IPv4)	104.21.43.235 172.67.188.125
AAAA (IPv6)	2606:4700:3034::6815:2beb 2606:4700:3031::ac43:bc7d

www.nhacaitangtien.vin Has IPv6

A (IPv4)	104.21.43.235 172.67.188.125
AAAA (IPv6)	2606:4700:3034::6815:2beb 2606:4700:3031::ac43:bc7d

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: nhacaitangtien.vin
Measured 2026-11-09 20:55:46 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.43.235, 172.67.188.125
AAAA (IPv6): 2606:4700:3034::6815:2beb, 2606:4700:3031::ac43:bc7d
www AAAA:    2606:4700:3034::6815:2beb, 2606:4700:3031::ac43:bc7d

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: nhacaitangtien.vin has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::6815:2beb: answers (TCP 443)
    2606:4700:3031::ac43:bc7d: answers (TCP 443)
- www over IPv6: www.nhacaitangtien.vin has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::6815:2beb: answers (TCP 443)
    2606:4700:3031::ac43:bc7d: 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 530) — can't tell whether that's specific to IPv6.
    https://nhacaitangtien.vin/ via 2606:4700:3034::6815:2beb -> HTTP 530, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/XMg-Pc353D

Permanent link: aaaa.bot/r/XMg-Pc353D · How we measure

Checked 2026-11-09 20:55:46 UTC. Full DNS report: dns.pizza/domain/nhacaitangtien.vin · Age, certificate and blocklists: how.is/nhacaitangtien.vin · JSON: /api/v1/nhacaitangtien.vin