Yes — uc-roblox.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 uc-roblox.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::6815:3eab answers · 443✓ 2606:4700:3033::ac43:898f answers · 443	yes
www over IPv6 www.uc-roblox.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::6815:3eab answers · 443✓ 2606:4700:3033::ac43:898f answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. aspmx1.migadu.com ✓aspmx2.migadu.com ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. logan.ns.cloudflare.com ✓monroe.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Redirects to roblox.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.

https://uc-roblox.com/ via 2606:4700:3035::6815:3eab → 302https://roblox.com/ · redirects to roblox.com, which has no IPv6 address

problem

Nothing keeping you from an A

A redirect leads off IPv6
Redirects to roblox.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all. Give the redirect target IPv6 too, or redirect somewhere that has it.

Check again

uc-roblox.com Has IPv6

A (IPv4)	104.21.62.171 172.67.137.143
AAAA (IPv6)	2606:4700:3035::6815:3eab 2606:4700:3033::ac43:898f

www.uc-roblox.com Has IPv6

A (IPv4)	104.21.62.171 172.67.137.143
AAAA (IPv6)	2606:4700:3035::6815:3eab 2606:4700:3033::ac43:898f

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: uc-roblox.com
Measured 2026-11-06 22:54:43 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.62.171, 172.67.137.143
AAAA (IPv6): 2606:4700:3035::6815:3eab, 2606:4700:3033::ac43:898f
www AAAA:    2606:4700:3035::6815:3eab, 2606:4700:3033::ac43:898f

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: uc-roblox.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::6815:3eab: answers (TCP 443)
    2606:4700:3033::ac43:898f: answers (TCP 443)
- www over IPv6: www.uc-roblox.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::6815:3eab: answers (TCP 443)
    2606:4700:3033::ac43:898f: 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): Redirects to roblox.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.
    https://uc-roblox.com/ via 2606:4700:3035::6815:3eab -> HTTP 302, certificate: valid
    https://roblox.com/ (redirects to roblox.com, which has no IPv6 address)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/ZWAm8FcZ6Q

Permanent link: aaaa.bot/r/ZWAm8FcZ6Q · How we measure

Checked 2026-11-06 22:54:43 UTC. Full DNS report: dns.pizza/domain/uc-roblox.com · Age, certificate and blocklists: how.is/uc-roblox.com · JSON: /api/v1/uc-roblox.com