Yes — rbx.com has IPv6.

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

Measured 2026-11-13 02:32 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check rbx.com now

B
IPv6 readiness
Works over IPv6, with one gap: its nameservers lack IPv6.
Website over IPv6
rbx.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
✓ 2600:9000:28a6:1000:3:66ef:d540:93a1 answers · 443✓ 2600:9000:28a6:bc00:3:66ef:d540:93a1 answers · 443✓ 2600:9000:28a6:5000:3:66ef:d540:93a1 answers · 443✓ 2600:9000:28a6:f800:3:66ef:d540:93a1 answers · 443– 2600:9000:28a6:2400:3:66ef:d540:93a1 not tested– 2600:9000:28a6:c000:3:66ef:d540:93a1 not tested– 2600:9000:28a6:d400:3:66ef:d540:93a1 not tested– 2600:9000:28a6:e200:3:66ef:d540:93a1 not tested
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
rbx-com.mail.protection.outlook.com ✓
yes
Nameservers have IPv6
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
nspx1.roblox.com ✗nspx2.roblox.net ✗nspx3.roblox.us ✗nspx4.roblox.co.uk ✗
no

First measured 2026-11-04; last confirmed 2026-11-13.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://rbx.com/ via 2600:9000:28a6:1000:3:66ef:d540:93a1 → 200
works
 Which outside scripts, fonts, payments or chat rbx.com loads from have no IPv6.
 Load rbx.com over IPv6 from up to six other places — a second opinion.

What's keeping rbx.com from an A

  1. Nameservers without IPv6
    nspx1.roblox.com, nspx2.roblox.net, nspx3.roblox.us, nspx4.roblox.co.uk all have no AAAA record, so a resolver that only speaks IPv6 can't look your domain up. Most DNS providers offer IPv6 nameservers; ask yours, or move DNS to one that does.

Check again

rbx.com  Has IPv6

A (IPv4)3.171.76.93
3.171.76.72
3.171.76.3
3.171.76.100
AAAA (IPv6)2600:9000:28a6:1000:3:66ef:d540:93a1
2600:9000:28a6:bc00:3:66ef:d540:93a1
2600:9000:28a6:5000:3:66ef:d540:93a1
2600:9000:28a6:f800:3:66ef:d540:93a1
2600:9000:28a6:2400:3:66ef:d540:93a1
2600:9000:28a6:c000:3:66ef:d540:93a1
2600:9000:28a6:d400:3:66ef:d540:93a1
2600:9000:28a6:e200:3:66ef:d540:93a1

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

 Permanent link: aaaa.bot/r/RggRpj6-QQ · How we measure

Checked 2026-11-13 02:32:24 UTC. Full DNS report: dns.pizza/domain/rbx.com · Age, certificate and blocklists: how.is/rbx.com · JSON: /api/v1/rbx.com