Yes — northwestern.edu has IPv6.

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

Measured 2026-11-02 16:56 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check northwestern.edu now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
northwestern.edu has an AAAA record and answers on it.
✓ 2620:10d:2060:1130::11 answers · 443
yes
www over IPv6
www.northwestern.edu has an AAAA record and answers on it.
✓ 2620:10d:2060:1130::11 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
chcspprf10.ads.northwestern.edu ✗evcspprf11.ads.northwestern.edu ✗evcspprf10.ads.northwestern.edu ✗evcspprf12.ads.northwestern.edu ✗chcspprf12.ads.northwestern.edu ✗chcspprf11.ads.northwestern.edu ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
accuvax.northwestern.edu ✓cicada.northwestern.edu ✓
yes

First measured 2026-11-02; last confirmed 2026-11-02.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://northwestern.edu/ via 2620:10d:2060:1130::11 → 301https://www.northwestern.edu/ via 2620:10d:2060:1130::11 → 200
works
 Load northwestern.edu over IPv6 from up to six other places — a second opinion.

What's keeping northwestern.edu from an A

  1. Mail servers without IPv6
    chcspprf10.ads.northwestern.edu, evcspprf11.ads.northwestern.edu, evcspprf10.ads.northwestern.edu, evcspprf12.ads.northwestern.edu, chcspprf12.ads.northwestern.edu, chcspprf11.ads.northwestern.edu have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

northwestern.edu  Has IPv6

A (IPv4)129.105.136.48
AAAA (IPv6)2620:10d:2060:1130::11

www.northwestern.edu  Has IPv6

Alias ofcommon.wideip.northwestern.edu
A (IPv4)129.105.136.48
AAAA (IPv6)2620:10d:2060:1130::11

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/6084CiE65J · How we measure

Checked 2026-11-02 16:56:38 UTC. Full DNS report: dns.pizza/domain/northwestern.edu · Age, certificate and blocklists: how.is/northwestern.edu · JSON: /api/v1/northwestern.edu