Yes — 4n5.app has IPv6.

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

This is a saved measurement from 2026-11-05 10:59 UTC. Check 4n5.app live now

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
4n5.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3036::ac43:dd2e answers · 443✓ 2606:4700:3033::6815:237d answers · 443
yes
www over IPv6
www.4n5.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3036::ac43:dd2e answers · 443✓ 2606:4700:3033::6815:237d 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.
fatima.ns.cloudflare.com ✓johnny.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://4n5.app/ via 2606:4700:3036::ac43:dd2e → 200
works

Nothing keeping you from an A

  1. Nothing to fix
    Show it off: add the badge to your README.
    [![IPv6](https://aaaa.bot/badge/4n5.app.svg)](https://aaaa.bot/4n5.app)

Check again

4n5.app  Has IPv6

A (IPv4)104.21.35.125
172.67.221.46
AAAA (IPv6)2606:4700:3036::ac43:dd2e
2606:4700:3033::6815:237d

www.4n5.app  Has IPv6

A (IPv4)104.21.35.125
172.67.221.46
AAAA (IPv6)2606:4700:3036::ac43:dd2e
2606:4700:3033::6815:237d

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

 Permanent link: aaaa.bot/r/UkST7EUc9N · How we measure

Checked 2026-11-05 10:59:55 UTC. Full DNS report: dns.pizza/domain/4n5.app · Age, certificate and blocklists: how.is/4n5.app · JSON: /api/v1/4n5.app