Yes — sub-tn.tech has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
sub-tn.tech has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3031::6815:786 answers · 443✓ 2606:4700:3031::ac43:bb92 answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
route3.mx.cloudflare.net ✓route2.mx.cloudflare.net ✓route1.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.
cloe.ns.cloudflare.com ✓damian.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://sub-tn.tech/ via 2606:4700:3031::6815:786 → 200
works
 Which outside scripts, fonts, payments or chat sub-tn.tech loads from have no IPv6.
 Load sub-tn.tech 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/sub-tn.tech.svg)](https://aaaa.bot/sub-tn.tech)

Check again

sub-tn.tech  Has IPv6

A (IPv4)104.21.7.134
172.67.187.146
AAAA (IPv6)2606:4700:3031::6815:786
2606:4700:3031::ac43:bb92

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/Yz6x2XPbgG · How we measure

Checked 2026-11-14 03:38:47 UTC. Full DNS report: dns.pizza/domain/sub-tn.tech · Age, certificate and blocklists: how.is/sub-tn.tech · JSON: /api/v1/sub-tn.tech