Yes — phongxonghoi.org has IPv6.

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

This is a saved measurement from 2026-11-04 17:03 UTC. Check phongxonghoi.org live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 phongxonghoi.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3033::6815:16ac answers · 443✓ 2606:4700:3037::ac43:cdf3 answers · 443	yes
www over IPv6 www.phongxonghoi.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:cdf3 answers · 443✓ 2606:4700:3033::6815:16ac 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. carla.ns.cloudflare.com ✓wilson.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://phongxonghoi.org/ via 2606:4700:3033::6815:16ac → 530

Nothing keeping you from an A

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

Check again

phongxonghoi.org Has IPv6

A (IPv4)	104.21.22.172 172.67.205.243
AAAA (IPv6)	2606:4700:3033::6815:16ac 2606:4700:3037::ac43:cdf3

www.phongxonghoi.org Has IPv6

A (IPv4)	104.21.22.172 172.67.205.243
AAAA (IPv6)	2606:4700:3037::ac43:cdf3 2606:4700:3033::6815:16ac

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: phongxonghoi.org
Measured 2026-11-04 17:03:59 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.22.172, 172.67.205.243
AAAA (IPv6): 2606:4700:3033::6815:16ac, 2606:4700:3037::ac43:cdf3
www AAAA:    2606:4700:3037::ac43:cdf3, 2606:4700:3033::6815:16ac

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: phongxonghoi.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3033::6815:16ac: answers (TCP 443)
    2606:4700:3037::ac43:cdf3: answers (TCP 443)
- www over IPv6: www.phongxonghoi.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:cdf3: answers (TCP 443)
    2606:4700:3033::6815:16ac: 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://phongxonghoi.org/ via 2606:4700:3033::6815:16ac -> HTTP 530, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/LSRyNA_Kem

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

Checked 2026-11-04 17:03:59 UTC. Full DNS report: dns.pizza/domain/phongxonghoi.org · Age, certificate and blocklists: how.is/phongxonghoi.org · JSON: /api/v1/phongxonghoi.org