Yes — casl-app.site has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
casl-app.site has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3031::ac43:9c16 answers · 443✓ 2606:4700:3033::6815:2a27 answers · 443
yes
www over IPv6
www.casl-app.site has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3033::6815:2a27 answers · 443✓ 2606:4700:3031::ac43:9c16 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.
bob.ns.cloudflare.com ✓gigi.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Answered over IPv6 with a server error (HTTP 523) — can't tell whether that's specific to IPv6.
https://casl-app.site/ via 2606:4700:3031::ac43:9c16 → 523
?
 Load casl-app.site 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/casl-app.site.svg)](https://aaaa.bot/casl-app.site)

Check again

casl-app.site  Has IPv6

A (IPv4)172.67.156.22
104.21.42.39
AAAA (IPv6)2606:4700:3031::ac43:9c16
2606:4700:3033::6815:2a27

www.casl-app.site  Has IPv6

A (IPv4)104.21.42.39
172.67.156.22
AAAA (IPv6)2606:4700:3033::6815:2a27
2606:4700:3031::ac43:9c16

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/_3VF6jSiJr · How we measure

Checked 2026-10-30 21:45:22 UTC. Full DNS report: dns.pizza/domain/casl-app.site · JSON: /api/v1/casl-app.site