Yes — calendar.utk.edu has IPv6.

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

This is a saved measurement from 2026-11-03 04:30 UTC. Check calendar.utk.edu live now

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