Yes — rfam.dev has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
rfam.dev has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3035::6815:2fe6 answers · 443✓ 2606:4700:3032::ac43:add4 answers · 443
yes
www over IPv6
www.rfam.dev has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3032::ac43:add4 answers · 443✓ 2606:4700:3035::6815:2fe6 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.
harlan.ns.cloudflare.com ✓nelly.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.
https://rfam.dev/ via 2606:4700:3035::6815:2fe6 → 403
works
 Which outside scripts, fonts, payments or chat rfam.dev loads from have no IPv6.
 Load rfam.dev 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/rfam.dev.svg)](https://aaaa.bot/rfam.dev)

Check again

rfam.dev  Has IPv6

A (IPv4)104.21.47.230
172.67.173.212
AAAA (IPv6)2606:4700:3035::6815:2fe6
2606:4700:3032::ac43:add4

www.rfam.dev  Has IPv6

A (IPv4)172.67.173.212
104.21.47.230
AAAA (IPv6)2606:4700:3032::ac43:add4
2606:4700:3035::6815:2fe6

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/24IZVXz0og · How we measure

Checked 2026-11-06 07:32:28 UTC. Full DNS report: dns.pizza/domain/rfam.dev · Age, certificate and blocklists: how.is/rfam.dev · JSON: /api/v1/rfam.dev