Yes — mailinger.app has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
mailinger.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3036::6815:362e answers · 443✓ 2606:4700:3037::ac43:df97 answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
route1.mx.cloudflare.net ✓route2.mx.cloudflare.net ✓route3.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.
ada.ns.cloudflare.com ✓kayden.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 401.
https://mailinger.app/ via 2606:4700:3036::6815:362e → 401
works
 Which outside scripts, fonts, payments or chat mailinger.app loads from have no IPv6.
 Load mailinger.app 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/mailinger.app.svg)](https://aaaa.bot/mailinger.app)

Check again

mailinger.app  Has IPv6

A (IPv4)104.21.54.46
172.67.223.151
AAAA (IPv6)2606:4700:3036::6815:362e
2606:4700:3037::ac43:df97

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/ohRzESQ_j7 · How we measure

Checked 2026-11-08 07:18:10 UTC. Full DNS report: dns.pizza/domain/mailinger.app · Age, certificate and blocklists: how.is/mailinger.app · JSON: /api/v1/mailinger.app