Yes — contapp.info has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
contapp.info has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3031::6815:4391 answers · 443✓ 2606:4700:3037::ac43:b157 answers · 443
yes
www over IPv6
www.contapp.info has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3031::6815:4391 answers · 443✓ 2606:4700:3037::ac43:b157 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.
georgia.ns.cloudflare.com ✓kurt.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.
https://contapp.info/ via 2606:4700:3031::6815:4391 → 403
works
 Which outside scripts, fonts, payments or chat contapp.info loads from have no IPv6.
 Load contapp.info 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/contapp.info.svg)](https://aaaa.bot/contapp.info)

Check again

contapp.info  Has IPv6

A (IPv4)172.67.177.87
104.21.67.145
AAAA (IPv6)2606:4700:3031::6815:4391
2606:4700:3037::ac43:b157

www.contapp.info  Has IPv6

A (IPv4)104.21.67.145
172.67.177.87
AAAA (IPv6)2606:4700:3031::6815:4391
2606:4700:3037::ac43:b157

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/XkjyJLpW9M · How we measure

Checked 2026-11-11 01:43:14 UTC. Full DNS report: dns.pizza/domain/contapp.info · Age, certificate and blocklists: how.is/contapp.info · JSON: /api/v1/contapp.info