Yes — joshsinger.dev has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 joshsinger.dev has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::6815:8b0 answers · 443✓ 2606:4700:3035::ac43:8290 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. andronicus.ns.cloudflare.com ✓coco.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://joshsinger.dev/ via 2606:4700:3032::6815:8b0 → 302https://josh-973.cloudflareaccess.com/cdn-cgi/access/login/joshsinger.dev?kid=8eb3ba7129f8c0615e51f547411839e665b2c06f1ec8028db870377dbca9af72&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImU0NGE5Y2I4YzkyNDU3ZTBmZjQ3OGY3NTEyZDc1M2YxNmRhMDI0M2MxZmM5ZTFmNzFlMGI0MTllMTJkZDAwZWUifQ.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.Vo3ghHCvnBcyKMwzU0tQtsfUdKsJoA0YgKUy5jc0SK8-SxWh1TtIyOFcFogTzXM52qMgzwoPkVSTRDenBRDOGiLWngoTQ1zZRbkn_nqD4ln2BqviJQ3PdfWeJ6I1y_qQwmjxbsXuwFg0TrW1De0KiRJOr7O3Oys7H8OK-tigSermQrrSECgFPvVMQMvxXsP6E5Z8lchQgJk27pGDBC2O9CtJhRWCux-j13VrRc1RswWuX1HCOtcifFtEcok-PJFl4DZfJOMZcoi5Ukiz4_6nMr-fCVGoi0B7XiqaJnHFD6oUUfXsxAxbbE072UAxpVmLlqVFV9DTAr4EUvZm92oH9w&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/joshsinger.dev.svg)](https://aaaa.bot/joshsinger.dev)

Check again

joshsinger.dev Has IPv6

A (IPv4)	104.21.8.176 172.67.130.144
AAAA (IPv6)	2606:4700:3032::6815:8b0 2606:4700:3035::ac43:8290

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: joshsinger.dev
Measured 2026-11-05 22:56:34 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.8.176, 172.67.130.144
AAAA (IPv6): 2606:4700:3032::6815:8b0, 2606:4700:3035::ac43:8290

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: joshsinger.dev has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::6815:8b0: answers (TCP 443)
    2606:4700:3035::ac43:8290: 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://joshsinger.dev/ via 2606:4700:3032::6815:8b0 -> HTTP 302, certificate: valid
    https://josh-973.cloudflareaccess.com/cdn-cgi/access/login/joshsinger.dev?kid=8eb3ba7129f8c0615e51f547411839e665b2c06f1ec8028db870377dbca9af72&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImU0NGE5Y2I4YzkyNDU3ZTBmZjQ3OGY3NTEyZDc1M2YxNmRhMDI0M2MxZmM5ZTFmNzFlMGI0MTllMTJkZDAwZWUifQ.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.Vo3ghHCvnBcyKMwzU0tQtsfUdKsJoA0YgKUy5jc0SK8-SxWh1TtIyOFcFogTzXM52qMgzwoPkVSTRDenBRDOGiLWngoTQ1zZRbkn_nqD4ln2BqviJQ3PdfWeJ6I1y_qQwmjxbsXuwFg0TrW1De0KiRJOr7O3Oys7H8OK-tigSermQrrSECgFPvVMQMvxXsP6E5Z8lchQgJk27pGDBC2O9CtJhRWCux-j13VrRc1RswWuX1HCOtcifFtEcok-PJFl4DZfJOMZcoi5Ukiz4_6nMr-fCVGoi0B7XiqaJnHFD6oUUfXsxAxbbE072UAxpVmLlqVFV9DTAr4EUvZm92oH9w&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/ha8vlmkzpx

Permanent link: aaaa.bot/r/ha8vlmkzpx · How we measure

Checked 2026-11-05 22:56:34 UTC. Full DNS report: dns.pizza/domain/joshsinger.dev · Age, certificate and blocklists: how.is/joshsinger.dev · JSON: /api/v1/joshsinger.dev