Yes — cosmo-ie.study has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 cosmo-ie.study has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3033::ac43:a88d answers · 443✓ 2606:4700:3037::6815:1ad1 answers · 443	yes
www over IPv6 www.cosmo-ie.study has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::6815:1ad1 answers · 443✓ 2606:4700:3033::ac43:a88d 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. kami.ns.cloudflare.com ✓lars.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Redirects to www.shopify.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.

https://cosmo-ie.study/ via 2606:4700:3033::ac43:a88d → 302https://www.shopify.com/ · redirects to www.shopify.com, which has no IPv6 address

problem

Nothing keeping you from an A

A redirect leads off IPv6
Redirects to www.shopify.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all. Give the redirect target IPv6 too, or redirect somewhere that has it.

Check again

cosmo-ie.study Has IPv6

A (IPv4)	172.67.168.141 104.21.26.209
AAAA (IPv6)	2606:4700:3033::ac43:a88d 2606:4700:3037::6815:1ad1

www.cosmo-ie.study Has IPv6

A (IPv4)	172.67.168.141 104.21.26.209
AAAA (IPv6)	2606:4700:3037::6815:1ad1 2606:4700:3033::ac43:a88d

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

IPv6 measurement: cosmo-ie.study
Measured 2026-11-06 08:51:40 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.168.141, 104.21.26.209
AAAA (IPv6): 2606:4700:3033::ac43:a88d, 2606:4700:3037::6815:1ad1
www AAAA:    2606:4700:3037::6815:1ad1, 2606:4700:3033::ac43:a88d

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: cosmo-ie.study has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3033::ac43:a88d: answers (TCP 443)
    2606:4700:3037::6815:1ad1: answers (TCP 443)
- www over IPv6: www.cosmo-ie.study has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::6815:1ad1: answers (TCP 443)
    2606:4700:3033::ac43:a88d: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.
- Nameservers have IPv6: 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Redirects to www.shopify.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.
    https://cosmo-ie.study/ via 2606:4700:3033::ac43:a88d -> HTTP 302, certificate: valid
    https://www.shopify.com/ (redirects to www.shopify.com, which has no IPv6 address)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/qpEAvgbIaG

Permanent link: aaaa.bot/r/qpEAvgbIaG · How we measure

Checked 2026-11-06 08:51:40 UTC. Full DNS report: dns.pizza/domain/cosmo-ie.study · Age, certificate and blocklists: how.is/cosmo-ie.study · JSON: /api/v1/cosmo-ie.study