Yes — tappon.bio has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
tappon.bio has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3031::6815:2ea answers · 443✓ 2606:4700:3035::ac43:81cc answers · 443
yes
www over IPv6
www.tappon.bio has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3035::ac43:81cc answers · 443✓ 2606:4700:3031::6815:2ea answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mail.tappon.bio ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
andy.ns.cloudflare.com ✓kate.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://tappon.bio/ via 2606:4700:3031::6815:2ea → 200
works
 Load tappon.bio over IPv6 from up to six other places — a second opinion.

What's keeping tappon.bio from an A

  1. Mail servers without IPv6
    mail.tappon.bio has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

tappon.bio  Has IPv6

A (IPv4)104.21.2.234
172.67.129.204
AAAA (IPv6)2606:4700:3031::6815:2ea
2606:4700:3035::ac43:81cc

www.tappon.bio  Has IPv6

A (IPv4)172.67.129.204
104.21.2.234
AAAA (IPv6)2606:4700:3035::ac43:81cc
2606:4700:3031::6815:2ea

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/WKXolTC7J1 · How we measure

Checked 2026-11-02 17:03:21 UTC. Full DNS report: dns.pizza/domain/tappon.bio · Age, certificate and blocklists: how.is/tappon.bio · JSON: /api/v1/tappon.bio