Yes — uiuc.edu has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
uiuc.edu has an AAAA record and answers on it.
✓ 2a01:111:f100:1002::4134:dc6d answers · 443
yes
www over IPv6
www.uiuc.edu has an AAAA record and answers on it.
✓ 2a01:111:f100:1002::4134:dc6d answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
incoming-relays.illinois.edu ✗
no
Nameservers have IPv6
3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
dns2.illinois.edu ✓dns3.illinois.edu ✓dns1.illinois.edu ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://uiuc.edu/ via 2a01:111:f100:1002::4134:dc6d → 301https://illinois.edu/ via 2a01:111:f100:1002::4134:dc6d → 200
works
 Load uiuc.edu over IPv6 from up to six other places — a second opinion.

What's keeping uiuc.edu from an A

  1. Mail servers without IPv6
    incoming-relays.illinois.edu has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

uiuc.edu  Has IPv6

A (IPv4)64.236.243.124
AAAA (IPv6)2a01:111:f100:1002::4134:dc6d

www.uiuc.edu  Has IPv6

Alias ofillinois.edu
A (IPv4)64.236.243.124
AAAA (IPv6)2a01:111:f100:1002::4134:dc6d

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/tZzXIcFQXD · How we measure

Checked 2026-11-02 09:02:04 UTC. Full DNS report: dns.pizza/domain/uiuc.edu · JSON: /api/v1/uiuc.edu