Yes — yupno.app has IPv6.

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

This is a saved measurement from 2026-11-14 18:29 UTC. Check yupno.app live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 yupno.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::ac43:c406 answers · 443✓ 2606:4700:3036::6815:151d answers · 443	yes
www over IPv6 www.yupno.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3036::6815:151d answers · 443✓ 2606:4700:3032::ac43:c406 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. hadlee.ns.cloudflare.com ✓uriah.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://yupno.app/ via 2606:4700:3032::ac43:c406 → 302https://wispy-poetry-9611.cloudflareaccess.com/cdn-cgi/access/login/yupno.app?kid=f3796595ca6b845bffedffddf57922c78a8590941cd8b36e97a45ce0e8812585&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.mlYMOp0_30RFeD_7zqOZ3bJ91bmZs3SdRckf9K8l3Wn6VAJewsv7T9gqtsEIigF0f7E1cGmQqLlhGRFCOoHZa2opepYP-KfiBDjVDfYX2frHPLVJA5LgcGlr6OgMAbykyV3RngzzqxwGqE87JHCJsx6o_jhAZuvv6T7dSzPwy1PsG4QbnB9l_K2xXw5MPIaTetQMYqevfZyEKjXL8XTHerdo5HmTpb5Zp13o63_dTfTXeWH6mBpMFXIEOdnNcJoV-R88gAgYfYjS9kb2iMm6YWf9CN51HMunKryr-pOKg4bI7PfgReuDhN5TMeE84yC-Oea1-2BGxmFSHoYr7fFNtA&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/yupno.app.svg)](https://aaaa.bot/yupno.app)

Check again

yupno.app Has IPv6

A (IPv4)	104.21.21.29 172.67.196.6
AAAA (IPv6)	2606:4700:3032::ac43:c406 2606:4700:3036::6815:151d

www.yupno.app Has IPv6

A (IPv4)	104.21.21.29 172.67.196.6
AAAA (IPv6)	2606:4700:3036::6815:151d 2606:4700:3032::ac43:c406

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: yupno.app
Measured 2026-11-14 18:29:51 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.21.29, 172.67.196.6
AAAA (IPv6): 2606:4700:3032::ac43:c406, 2606:4700:3036::6815:151d
www AAAA:    2606:4700:3036::6815:151d, 2606:4700:3032::ac43:c406

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: yupno.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::ac43:c406: answers (TCP 443)
    2606:4700:3036::6815:151d: answers (TCP 443)
- www over IPv6: www.yupno.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3036::6815:151d: answers (TCP 443)
    2606:4700:3032::ac43:c406: 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://yupno.app/ via 2606:4700:3032::ac43:c406 -> HTTP 302, certificate: valid
    https://wispy-poetry-9611.cloudflareaccess.com/cdn-cgi/access/login/yupno.app?kid=f3796595ca6b845bffedffddf57922c78a8590941cd8b36e97a45ce0e8812585&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.mlYMOp0_30RFeD_7zqOZ3bJ91bmZs3SdRckf9K8l3Wn6VAJewsv7T9gqtsEIigF0f7E1cGmQqLlhGRFCOoHZa2opepYP-KfiBDjVDfYX2frHPLVJA5LgcGlr6OgMAbykyV3RngzzqxwGqE87JHCJsx6o_jhAZuvv6T7dSzPwy1PsG4QbnB9l_K2xXw5MPIaTetQMYqevfZyEKjXL8XTHerdo5HmTpb5Zp13o63_dTfTXeWH6mBpMFXIEOdnNcJoV-R88gAgYfYjS9kb2iMm6YWf9CN51HMunKryr-pOKg4bI7PfgReuDhN5TMeE84yC-Oea1-2BGxmFSHoYr7fFNtA&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/w7SEht4VA2

Permanent link: aaaa.bot/r/w7SEht4VA2 · How we measure

Checked 2026-11-14 18:29:51 UTC. Full DNS report: dns.pizza/domain/yupno.app · Age, certificate and blocklists: how.is/yupno.app · JSON: /api/v1/yupno.app