Yes — tycastle.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 tycastle.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3030::6815:3064 answers · 443✓ 2606:4700:3034::ac43:b7ca 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. ganz.ns.cloudflare.com ✓nina.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://tycastle.com/ via 2606:4700:3030::6815:3064 → 302https://autumn-violet-82ed.cloudflareaccess.com/cdn-cgi/access/login/tycastle.com?kid=8f6db0dda0f0c845aefceadd0439d164ae2980830abd8622622fe3e0f0f8363b&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.A6BNAIueTDl2FWYvM41FIUsoN7ZiEOu5L_I_9OPOh3qNRbsPnc7W2kCyLJQxWNvgINpV49fdFokEU8NvbVjaAl5Om9wKqkuanlS2490LdZ2wSodk62fecbH4sA6ueLJeezvFRZ9cTyuDNctPXNXl18qMQRfkFE291NkUoD1DXp5i14I8_5N6vv1Ehkc1ZrlM5HrA6Syt8xtmVIU9ZPQlgoc_WMGjNBtVCBLTf1cBM_GbSb3auwypW5YCvZh-HkbNx6SdxnwV7KE5qtKKj6xR12C8kQs4e6sp4dOJ0lTa7N8hEbKpE_vc1SMa8LpAiUxYP9SMr2uTmQDIgVE6JYTEeQ&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/tycastle.com.svg)](https://aaaa.bot/tycastle.com)

Check again

tycastle.com Has IPv6

A (IPv4)	172.67.183.202 104.21.48.100
AAAA (IPv6)	2606:4700:3030::6815:3064 2606:4700:3034::ac43:b7ca

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: tycastle.com
Measured 2026-11-09 02:25:01 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.183.202, 104.21.48.100
AAAA (IPv6): 2606:4700:3030::6815:3064, 2606:4700:3034::ac43:b7ca

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: tycastle.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3030::6815:3064: answers (TCP 443)
    2606:4700:3034::ac43:b7ca: 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://tycastle.com/ via 2606:4700:3030::6815:3064 -> HTTP 302, certificate: valid
    https://autumn-violet-82ed.cloudflareaccess.com/cdn-cgi/access/login/tycastle.com?kid=8f6db0dda0f0c845aefceadd0439d164ae2980830abd8622622fe3e0f0f8363b&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.A6BNAIueTDl2FWYvM41FIUsoN7ZiEOu5L_I_9OPOh3qNRbsPnc7W2kCyLJQxWNvgINpV49fdFokEU8NvbVjaAl5Om9wKqkuanlS2490LdZ2wSodk62fecbH4sA6ueLJeezvFRZ9cTyuDNctPXNXl18qMQRfkFE291NkUoD1DXp5i14I8_5N6vv1Ehkc1ZrlM5HrA6Syt8xtmVIU9ZPQlgoc_WMGjNBtVCBLTf1cBM_GbSb3auwypW5YCvZh-HkbNx6SdxnwV7KE5qtKKj6xR12C8kQs4e6sp4dOJ0lTa7N8hEbKpE_vc1SMa8LpAiUxYP9SMr2uTmQDIgVE6JYTEeQ&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/BMQo9xcUnQ

Permanent link: aaaa.bot/r/BMQo9xcUnQ · How we measure

Checked 2026-11-09 02:25:01 UTC. Full DNS report: dns.pizza/domain/tycastle.com · Age, certificate and blocklists: how.is/tycastle.com · JSON: /api/v1/tycastle.com