Yes — calendar.utk.edu has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 calendar.utk.edu has an AAAA record and answers on it. ✓ 2603:1061:14:75::1 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 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns0076.secondary.cloudflare.com ✓ns0229.secondary.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.

https://calendar.utk.edu/ via 2603:1061:14:75::1 → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/calendar.utk.edu.svg)](https://aaaa.bot/calendar.utk.edu)

Check again

calendar.utk.edu Has IPv6

Alias of	utk.enterprise.localist.com → enterprise-web.localist.com → localist-production-ftgjadhqgwdqhbfp.z03.azurefd.net → mr-z03.tm-azurefd.net
A (IPv4)	150.171.109.118
AAAA (IPv6)	2603:1061:14:75::1

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: calendar.utk.edu
Measured 2026-11-03 04:30:53 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    150.171.109.118
AAAA (IPv6): 2603:1061:14:75::1

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: calendar.utk.edu has an AAAA record and answers on it.
    2603:1061:14:75::1: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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): Loads over IPv6 with a valid certificate: HTTP 200.
    https://calendar.utk.edu/ via 2603:1061:14:75::1 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/whpGwvDT9o

Permanent link: aaaa.bot/r/whpGwvDT9o · How we measure

Checked 2026-11-03 04:30:53 UTC. Full DNS report: dns.pizza/domain/calendar.utk.edu · Age, certificate and blocklists: how.is/calendar.utk.edu · JSON: /api/v1/calendar.utk.edu