Yes — remnml.app 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
remnml.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3035::ac43:d31b answers · 443✓ 2606:4700:3033::6815:5d91 answers · 443
yes
www over IPv6
www.remnml.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3035::ac43:d31b answers · 443✓ 2606:4700:3033::6815:5d91 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
us1-smtp.messagingengine.com ✗us2-smtp.messagingengine.com ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
may.ns.cloudflare.com ✓tim.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://remnml.app/ via 2606:4700:3035::ac43:d31b → 200
works
 Load remnml.app over IPv6 from up to six other places — a second opinion.

What's keeping remnml.app from an A

  1. Mail servers without IPv6
    us1-smtp.messagingengine.com, us2-smtp.messagingengine.com have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

remnml.app  Has IPv6

A (IPv4)104.21.93.145
172.67.211.27
AAAA (IPv6)2606:4700:3035::ac43:d31b
2606:4700:3033::6815:5d91

www.remnml.app  Has IPv6

A (IPv4)172.67.211.27
104.21.93.145
AAAA (IPv6)2606:4700:3035::ac43:d31b
2606:4700:3033::6815:5d91

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/494hCGxMKZ · How we measure

Checked 2026-11-05 15:15:37 UTC. Full DNS report: dns.pizza/domain/remnml.app · Age, certificate and blocklists: how.is/remnml.app · JSON: /api/v1/remnml.app