Yes — aestimon.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 aestimon.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::ac43:ae9e answers · 443✓ 2606:4700:3031::6815:1f0b 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. rodrigo.ns.cloudflare.com ✓teresa.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://aestimon.app/ via 2606:4700:3032::ac43:ae9e → 302https://super-frost-5ab7.cloudflareaccess.com/cdn-cgi/access/login/aestimon.app?kid=edec6762972483f5efb59b5698b86997ae133bf591770156c9edb441e19cabcd&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjE3N2E4ZjJiMWZkYWVmZTBkM2Y4MjAxN2ZiMDNhMzEzMGUwZGEzMzhiZDk4ZmY2MGQ5ODg1ZWIyMTU4NmI4OWMifQ.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.s40VmaoH9jQlRckpB-aPpm07N3WuaGq82C-mDqkO_v26spIgKuNzGFZU1HtKmptTQZ0JEs5mNYBwJeUpOKNGiuSRxcDS9cMpuBr_QfY-0wEDovYC9ffN7DHYwfzlPtnxuIJmml1HTYVKr0Un2hS0Y94Aw9cyz3kECARhUEH128CM0vwkh87tvLKEj0G7o9yJ6ApN6ACszptKmGUdHVspH1QC6NieAPsc0uXy4yUxblxK0YE7gmIfR8sCRcBub7JKSSVJ8vcGyGmMwSYC4QpiVxVsodpYGtWT7RcoYl3_9RP3EZbEWjijMy2Fcy9DvT_NLy2-Y7Mun4U6F1GSBH3-Mg&redirect_url=%2F via 2606:4700:300a::6813:c21d → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/aestimon.app.svg)](https://aaaa.bot/aestimon.app)

Check again

aestimon.app Has IPv6

A (IPv4)	172.67.174.158 104.21.31.11
AAAA (IPv6)	2606:4700:3032::ac43:ae9e 2606:4700:3031::6815:1f0b

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: aestimon.app
Measured 2026-11-06 14:59:59 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.174.158, 104.21.31.11
AAAA (IPv6): 2606:4700:3032::ac43:ae9e, 2606:4700:3031::6815:1f0b

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: aestimon.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::ac43:ae9e: answers (TCP 443)
    2606:4700:3031::6815:1f0b: 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): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://aestimon.app/ via 2606:4700:3032::ac43:ae9e -> HTTP 302, certificate: valid
    https://super-frost-5ab7.cloudflareaccess.com/cdn-cgi/access/login/aestimon.app?kid=edec6762972483f5efb59b5698b86997ae133bf591770156c9edb441e19cabcd&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjE3N2E4ZjJiMWZkYWVmZTBkM2Y4MjAxN2ZiMDNhMzEzMGUwZGEzMzhiZDk4ZmY2MGQ5ODg1ZWIyMTU4NmI4OWMifQ.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.s40VmaoH9jQlRckpB-aPpm07N3WuaGq82C-mDqkO_v26spIgKuNzGFZU1HtKmptTQZ0JEs5mNYBwJeUpOKNGiuSRxcDS9cMpuBr_QfY-0wEDovYC9ffN7DHYwfzlPtnxuIJmml1HTYVKr0Un2hS0Y94Aw9cyz3kECARhUEH128CM0vwkh87tvLKEj0G7o9yJ6ApN6ACszptKmGUdHVspH1QC6NieAPsc0uXy4yUxblxK0YE7gmIfR8sCRcBub7JKSSVJ8vcGyGmMwSYC4QpiVxVsodpYGtWT7RcoYl3_9RP3EZbEWjijMy2Fcy9DvT_NLy2-Y7Mun4U6F1GSBH3-Mg&redirect_url=%2F via 2606:4700:300a::6813:c21d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/pz806uxuJO

Permanent link: aaaa.bot/r/pz806uxuJO · How we measure

Checked 2026-11-06 14:59:59 UTC. Full DNS report: dns.pizza/domain/aestimon.app · Age, certificate and blocklists: how.is/aestimon.app · JSON: /api/v1/aestimon.app