Yes — cadersa.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
cadersa.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3035::6815:2cbe answers · 443✓ 2606:4700:3031::ac43:cb3c answers · 443
yes
www over IPv6
www.cadersa.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3035::6815:2cbe answers · 443✓ 2606:4700:3031::ac43:cb3c answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
_dc-mx.a9728380fbd2.cadersa.app ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
maleah.ns.cloudflare.com ✓tadeo.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.
https://cadersa.app/ via 2606:4700:3035::6815:2cbe → 403
works
 Load cadersa.app over IPv6 from up to six other places — a second opinion.

What's keeping cadersa.app from an A

  1. Mail servers without IPv6
    _dc-mx.a9728380fbd2.cadersa.app 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

cadersa.app  Has IPv6

A (IPv4)172.67.203.60
104.21.44.190
AAAA (IPv6)2606:4700:3035::6815:2cbe
2606:4700:3031::ac43:cb3c

www.cadersa.app  Has IPv6

A (IPv4)104.21.44.190
172.67.203.60
AAAA (IPv6)2606:4700:3035::6815:2cbe
2606:4700:3031::ac43:cb3c

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/WwHZT547ov · How we measure

Checked 2026-10-31 23:16:46 UTC. Full DNS report: dns.pizza/domain/cadersa.app · JSON: /api/v1/cadersa.app