Yes — 51bb.app has IPv6.

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

This is a saved measurement from 2026-11-03 02:11 UTC. Check 51bb.app live now

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
51bb.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3034::6815:12d3 answers · 443✓ 2606:4700:3037::ac43:b75e answers · 443
yes
www over IPv6
www.51bb.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3034::6815:12d3 answers · 443✓ 2606:4700:3037::ac43:b75e 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://51bb.app/ via 2606:4700:3034::6815:12d3 → 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/51bb.app.svg)](https://aaaa.bot/51bb.app)

Check again

51bb.app  Has IPv6

A (IPv4)104.21.18.211
172.67.183.94
AAAA (IPv6)2606:4700:3034::6815:12d3
2606:4700:3037::ac43:b75e

www.51bb.app  Has IPv6

A (IPv4)104.21.18.211
172.67.183.94
AAAA (IPv6)2606:4700:3034::6815:12d3
2606:4700:3037::ac43:b75e

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/BrTLsBHw4N · How we measure

Checked 2026-11-03 02:11:07 UTC. Full DNS report: dns.pizza/domain/51bb.app · Age, certificate and blocklists: how.is/51bb.app · JSON: /api/v1/51bb.app