Yes — keyscope.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 keyscope.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::ac43:b6a6 answers · 443✓ 2606:4700:3032::6815:3053 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. route2.mx.cloudflare.net ✓route1.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. julissa.ns.cloudflare.com ✓walt.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://keyscope.app/ via 2606:4700:3032::ac43:b6a6 → 302https://3211labs.cloudflareaccess.com/cdn-cgi/access/login/keyscope.app?kid=e974c109461ad138e95a454ae098ceee3fe608de88ba75f55510bdfeb4042a13&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImUwNWJmZWE0MjUxNmU0MzlkYmRjNDIyMGMwMGZhMTY4MmUxNWJlNDVmZTgxMGQ2Y2RmYzkyOGUzYmIxN2NmMmIifQ.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.X5jqdLd7W4osBxX4Ba5BT5j5OUIT2horBudWvgB-22eom_EIp53fiUMg26MepZ7WTlAYL__jL3z9ftFSnUVZsznACMEUNTTggrSLQf9WuH5Vf1E8Iqf2J39z-oXq6pDX9dtog_GgwuXd4H-s4Xh1IgFgYhkmm7h3jmIL_xqEMfdtwpYqlPRXMy_mlUxkurfRLOe_N4UJJqBBGvDc5AQo113V8qZvD93WmM5CcHCdNTBa4pQNRqCXViuizF66UerSfe5lppAFLlmle5W-pdlJWM8ZRcknHQOkQNydqWqWn526QYlHbNgnv84tsFiEKtiv4wTCZQYFu3q2GTJtp98RUg&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/keyscope.app.svg)](https://aaaa.bot/keyscope.app)

Check again

keyscope.app Has IPv6

A (IPv4)	104.21.48.83 172.67.182.166
AAAA (IPv6)	2606:4700:3032::ac43:b6a6 2606:4700:3032::6815:3053

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: keyscope.app
Measured 2026-11-05 21:42:02 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.48.83, 172.67.182.166
AAAA (IPv6): 2606:4700:3032::ac43:b6a6, 2606:4700:3032::6815:3053

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: keyscope.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::ac43:b6a6: answers (TCP 443)
    2606:4700:3032::6815:3053: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server 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://keyscope.app/ via 2606:4700:3032::ac43:b6a6 -> HTTP 302, certificate: valid
    https://3211labs.cloudflareaccess.com/cdn-cgi/access/login/keyscope.app?kid=e974c109461ad138e95a454ae098ceee3fe608de88ba75f55510bdfeb4042a13&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImUwNWJmZWE0MjUxNmU0MzlkYmRjNDIyMGMwMGZhMTY4MmUxNWJlNDVmZTgxMGQ2Y2RmYzkyOGUzYmIxN2NmMmIifQ.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.X5jqdLd7W4osBxX4Ba5BT5j5OUIT2horBudWvgB-22eom_EIp53fiUMg26MepZ7WTlAYL__jL3z9ftFSnUVZsznACMEUNTTggrSLQf9WuH5Vf1E8Iqf2J39z-oXq6pDX9dtog_GgwuXd4H-s4Xh1IgFgYhkmm7h3jmIL_xqEMfdtwpYqlPRXMy_mlUxkurfRLOe_N4UJJqBBGvDc5AQo113V8qZvD93WmM5CcHCdNTBa4pQNRqCXViuizF66UerSfe5lppAFLlmle5W-pdlJWM8ZRcknHQOkQNydqWqWn526QYlHbNgnv84tsFiEKtiv4wTCZQYFu3q2GTJtp98RUg&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/u5NavfC6Os

Permanent link: aaaa.bot/r/u5NavfC6Os · How we measure

Checked 2026-11-05 21:42:02 UTC. Full DNS report: dns.pizza/domain/keyscope.app · Age, certificate and blocklists: how.is/keyscope.app · JSON: /api/v1/keyscope.app