Yes — os-index.org has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
os-index.org has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3037::ac43:c8c6 answers · 443✓ 2606:4700:3037::6815:2c90 answers · 443
yes
www over IPv6
www.os-index.org has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3037::ac43:c8c6 answers · 443✓ 2606:4700:3037::6815:2c90 answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
route2.mx.cloudflare.net ✓route1.mx.cloudflare.net ✓route3.mx.cloudflare.net ✓
yes
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
poppy.ns.cloudflare.com ✓skip.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://os-index.org/ via 2606:4700:3037::ac43:c8c6 → 200
works
 Which outside scripts, fonts, payments or chat os-index.org loads from have no IPv6.
 Load os-index.org over IPv6 from up to six other places — a second opinion.

Nothing keeping you from an A

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

Check again

os-index.org  Has IPv6

A (IPv4)104.21.44.144
172.67.200.198
AAAA (IPv6)2606:4700:3037::ac43:c8c6
2606:4700:3037::6815:2c90

www.os-index.org  Has IPv6

A (IPv4)172.67.200.198
104.21.44.144
AAAA (IPv6)2606:4700:3037::ac43:c8c6
2606:4700:3037::6815:2c90

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/Fr5ahAHSr- · How we measure

Checked 2026-11-14 10:11:14 UTC. Full DNS report: dns.pizza/domain/os-index.org · Age, certificate and blocklists: how.is/os-index.org · JSON: /api/v1/os-index.org