Yes — upsdwn.site has IPv6.

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

This is a saved measurement from 2026-11-01 03:50 UTC. Check upsdwn.site live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 upsdwn.site has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3033::6815:1bc9 answers · 443✓ 2606:4700:3034::ac43:a9bb answers · 443	yes
www over IPv6 www.upsdwn.site has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::ac43:a9bb answers · 443✓ 2606:4700:3033::6815:1bc9 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. candy.ns.cloudflare.com ✓cody.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://upsdwn.site/ via 2606:4700:3033::6815:1bc9 → 302https://upsdwn.site/login via 2606:4700:3033::6815:1bc9 → 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/upsdwn.site.svg)](https://aaaa.bot/upsdwn.site)

Check again

upsdwn.site Has IPv6

A (IPv4)	172.67.169.187 104.21.27.201
AAAA (IPv6)	2606:4700:3033::6815:1bc9 2606:4700:3034::ac43:a9bb

www.upsdwn.site Has IPv6

A (IPv4)	172.67.169.187 104.21.27.201
AAAA (IPv6)	2606:4700:3034::ac43:a9bb 2606:4700:3033::6815:1bc9

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: upsdwn.site
Measured 2026-11-01 03:50:11 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.169.187, 104.21.27.201
AAAA (IPv6): 2606:4700:3033::6815:1bc9, 2606:4700:3034::ac43:a9bb
www AAAA:    2606:4700:3034::ac43:a9bb, 2606:4700:3033::6815:1bc9

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: upsdwn.site has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3033::6815:1bc9: answers (TCP 443)
    2606:4700:3034::ac43:a9bb: answers (TCP 443)
- www over IPv6: www.upsdwn.site has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::ac43:a9bb: answers (TCP 443)
    2606:4700:3033::6815:1bc9: 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://upsdwn.site/ via 2606:4700:3033::6815:1bc9 -> HTTP 302, certificate: valid
    https://upsdwn.site/login via 2606:4700:3033::6815:1bc9 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/CNUvdcEkGp

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

Checked 2026-11-01 03:50:11 UTC. Full DNS report: dns.pizza/domain/upsdwn.site · JSON: /api/v1/upsdwn.site