Yes — calendar.sdsu.edu has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its nameservers lack IPv6.
Website over IPv6
calendar.sdsu.edu has an AAAA record and answers on it.
✓ 2607:f8b0:4004:c27::79 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
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
ns02.sdsu.edu ✗ns01.sdsu.edu ✗
no
HTTPS over IPv6 · not part of the grade yet
calendar.sdsu.edu didn't complete an HTTPS request over IPv6 (connection closed before a response).
https://calendar.sdsu.edu/ via 2607:f8b0:4004:c27::79 · connection closed before a response
?
 Load calendar.sdsu.edu over IPv6 from up to six other places — a second opinion.

What's keeping calendar.sdsu.edu from an A

  1. Nameservers without IPv6
    ns02.sdsu.edu, ns01.sdsu.edu 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

calendar.sdsu.edu  Has IPv6

Alias ofghs.googlehosted.com
A (IPv4)172.253.63.121
AAAA (IPv6)2607:f8b0:4004:c27::79

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/VSWVvorJLO · How we measure

Checked 2026-11-03 09:38:01 UTC. Full DNS report: dns.pizza/domain/calendar.sdsu.edu · Age, certificate and blocklists: how.is/calendar.sdsu.edu · JSON: /api/v1/calendar.sdsu.edu