Yes — oneshot.cool has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 oneshot.cool has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::ac43:8ade answers · 443✓ 2606:4700:3033::6815:56fd 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. emerie.ns.cloudflare.com ✓kai.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://oneshot.cool/ via 2606:4700:3034::ac43:8ade → 302https://wincondev.cloudflareaccess.com/cdn-cgi/access/login/oneshot.cool?kid=8f9689e0a5273b0f61b929fb81ee1e4b4ffd6dda420a0743a2ece1e79d788bf5&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijk2NzY3MjBmZTMwZWMwMWU3ODdlMWI0ZDBiMjAxM2M5YzIwNDUxMjI3OTE1Njg0MmQzMTljYjY3MzdhMmFkYTMifQ.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.IUfl2qR63YEM-F_oBHlcw3anzMxmdYK6jJv2b9iy9WBgBBWMo3bJWrWSMslmC8d2iNVTteMhWh82FBoLKvm8__OMe4FajedCTBc3qluN0AkFGoKO1fbTZ39agUMCP-eRuDbsbhiUmayr8IwL7OU6vhWm8r6ejjw3gW1-nIag-jCGWHtafK68HHWsSZbOlkQCz5dupVTMFmJ5btM-i_Y5PsXx50uSKmf5Stp1eIUm-tRZobtl4UNNbrH-6C-6vkZsfWEbI6SDC-RNaWwN_V2toMejKUl35N2pt-GAesSF2It1x_2LmcIQygtrxBNndmv61HuvwlG2GF4qBAFL8hobsA&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/oneshot.cool.svg)](https://aaaa.bot/oneshot.cool)

Check again

oneshot.cool Has IPv6

A (IPv4)	172.67.138.222 104.21.86.253
AAAA (IPv6)	2606:4700:3034::ac43:8ade 2606:4700:3033::6815:56fd

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: oneshot.cool
Measured 2026-11-06 00:51:49 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.138.222, 104.21.86.253
AAAA (IPv6): 2606:4700:3034::ac43:8ade, 2606:4700:3033::6815:56fd

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: oneshot.cool has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::ac43:8ade: answers (TCP 443)
    2606:4700:3033::6815:56fd: 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://oneshot.cool/ via 2606:4700:3034::ac43:8ade -> HTTP 302, certificate: valid
    https://wincondev.cloudflareaccess.com/cdn-cgi/access/login/oneshot.cool?kid=8f9689e0a5273b0f61b929fb81ee1e4b4ffd6dda420a0743a2ece1e79d788bf5&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijk2NzY3MjBmZTMwZWMwMWU3ODdlMWI0ZDBiMjAxM2M5YzIwNDUxMjI3OTE1Njg0MmQzMTljYjY3MzdhMmFkYTMifQ.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.IUfl2qR63YEM-F_oBHlcw3anzMxmdYK6jJv2b9iy9WBgBBWMo3bJWrWSMslmC8d2iNVTteMhWh82FBoLKvm8__OMe4FajedCTBc3qluN0AkFGoKO1fbTZ39agUMCP-eRuDbsbhiUmayr8IwL7OU6vhWm8r6ejjw3gW1-nIag-jCGWHtafK68HHWsSZbOlkQCz5dupVTMFmJ5btM-i_Y5PsXx50uSKmf5Stp1eIUm-tRZobtl4UNNbrH-6C-6vkZsfWEbI6SDC-RNaWwN_V2toMejKUl35N2pt-GAesSF2It1x_2LmcIQygtrxBNndmv61HuvwlG2GF4qBAFL8hobsA&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/RZyLXoyHJb

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

Checked 2026-11-06 00:51:49 UTC. Full DNS report: dns.pizza/domain/oneshot.cool · Age, certificate and blocklists: how.is/oneshot.cool · JSON: /api/v1/oneshot.cool