Yes — returningofficer.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 returningofficer.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::ac43:df50 answers · 443✓ 2606:4700:3035::6815:4e95 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. route3.mx.cloudflare.net ✓route2.mx.cloudflare.net ✓route1.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. ara.ns.cloudflare.com ✓chase.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://returningofficer.app/ via 2606:4700:3032::ac43:df50 → 302https://returningofficer.cloudflareaccess.com/cdn-cgi/access/login/returningofficer.app?kid=343a49749d60058d0c077b7ac21b0a3af5ccd1ca000317ea4a5115a8b6580e9c&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjliZDQwZGE5MmE2MDU1ZTEwMjNjYzUwYzQxZGFjMTA4NWZiZmM5NmU5MjM2NDUyZDQ2YzNjMDIxNzU5Y2IyOWYifQ.eyJ0eXBlIjoibWV0YSIsImF1ZCI6IjM0M2E0OTc0OWQ2MDA1OGQwYzA3N2I3YWMyMWIwYTNhZjVjY2QxY2EwMDAzMTdlYTRhNTExNWE4YjY1ODBlOWMiLCJob3N0bmFtZSI6InJldHVybmluZ29mZmljZXIuYXBwIiwicmVkaXJlY3RfdXJsIjoiLyIsInNlcnZpY2VfdG9rZW5fc3RhdHVzIjpmYWxzZSwiaXNfd2FycCI6ZmFsc2UsImlzX2dhdGV3YXkiOmZhbHNlLCJleHAiOjE3OTM4MTAxNTcsIm5iZiI6MTc5MzgwOTg1NywiaWF0IjoxNzkzODA5ODU3LCJhdXRoX3N0YXR1cyI6Ik5PTkUiLCJtdGxzX2F1dGgiOnsiY2VydF9pc3N1ZXJfZG4iOiIiLCJjZXJ0X3NlcmlhbCI6IiIsImNlcnRfaXNzdWVyX3NraSI6IiIsImNlcnRfcHJlc2VudGVkIjpmYWxzZSwiY29tbW9uX25hbWUiOiIiLCJhdXRoX3N0YXR1cyI6Ik5PTkUifSwicmVhbF9jb3VudHJ5IjoiVVMiLCJhcHBfc2Vzc2lvbl9oYXNoIjoiNTVhMDBhMGQ4YWU1NDA4NDQzMzlmM2NjNjc0ZGU0NDNmMDMwY2MwNTczYjk3ZTU5NjRiM2YxNTgyM2QyNDUwNCJ9.Ds-Ob_XhH0REMOGUlHAjHvGILuEdt3blMN54hYcJI9XUbxILkZEuDNDSkT2Kt9zOuZ2SGenozbgocZfmtZ9IDPZPb33qSmhbblmrhAqdU2RTGv-37wqZ3auwbvNipWvUO19UzhrCfHw8ZS1CKi3TP6z6dgk5vnqzjQHnB6JmPDSa-5SGCE1not4FtqHGIydrFwTN18fIBytnhtB4lCCtCYslrfmbpiyBu6Gy2wd5BNe1h_3yhuJx5aHoCRFNdi5ipZ_n4EWsH0RQLrV4BX8zd1ZexU7rpDH6cD_ApKVWtkGdDdPaRVFI4ucanNEVGxXgM52-N-ulhLTBWdjNEKeIUg&redirect_url=%2F via 2606:4700:300a::6813:c31d → 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/returningofficer.app.svg)](https://aaaa.bot/returningofficer.app)

Check again

returningofficer.app Has IPv6

A (IPv4)	172.67.223.80 104.21.78.149
AAAA (IPv6)	2606:4700:3032::ac43:df50 2606:4700:3035::6815:4e95

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: returningofficer.app
Measured 2026-11-04 16:30:57 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.223.80, 104.21.78.149
AAAA (IPv6): 2606:4700:3032::ac43:df50, 2606:4700:3035::6815:4e95

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: returningofficer.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::ac43:df50: answers (TCP 443)
    2606:4700:3035::6815:4e95: 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://returningofficer.app/ via 2606:4700:3032::ac43:df50 -> HTTP 302, certificate: valid
    https://returningofficer.cloudflareaccess.com/cdn-cgi/access/login/returningofficer.app?kid=343a49749d60058d0c077b7ac21b0a3af5ccd1ca000317ea4a5115a8b6580e9c&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjliZDQwZGE5MmE2MDU1ZTEwMjNjYzUwYzQxZGFjMTA4NWZiZmM5NmU5MjM2NDUyZDQ2YzNjMDIxNzU5Y2IyOWYifQ.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.Ds-Ob_XhH0REMOGUlHAjHvGILuEdt3blMN54hYcJI9XUbxILkZEuDNDSkT2Kt9zOuZ2SGenozbgocZfmtZ9IDPZPb33qSmhbblmrhAqdU2RTGv-37wqZ3auwbvNipWvUO19UzhrCfHw8ZS1CKi3TP6z6dgk5vnqzjQHnB6JmPDSa-5SGCE1not4FtqHGIydrFwTN18fIBytnhtB4lCCtCYslrfmbpiyBu6Gy2wd5BNe1h_3yhuJx5aHoCRFNdi5ipZ_n4EWsH0RQLrV4BX8zd1ZexU7rpDH6cD_ApKVWtkGdDdPaRVFI4ucanNEVGxXgM52-N-ulhLTBWdjNEKeIUg&redirect_url=%2F via 2606:4700:300a::6813:c31d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/bKKVKd8Vq6

Permanent link: aaaa.bot/r/bKKVKd8Vq6 · How we measure

Checked 2026-11-04 16:30:57 UTC. Full DNS report: dns.pizza/domain/returningofficer.app · Age, certificate and blocklists: how.is/returningofficer.app · JSON: /api/v1/returningofficer.app