Yes — vpn.upenn.edu has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
vpn.upenn.edu has an AAAA record and answers on it.
✓ 2607:f470:0:2:0:4:56:3 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
6 of 8 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
dns1.udel.edu ✗dns2.udel.edu ✗adns1.nnn.upenn.edu ✓adns2.nnn.upenn.edu ✓adns3.nnn.upenn.edu ✓adns4.upenn.edu ✓adns5.upenn.edu ✓adns6.upenn.edu ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.
https://vpn.upenn.edu/ via 2607:f470:0:2:0:4:56:3 → 403
works
 Load vpn.upenn.edu over IPv6 from up to six other places — a second opinion.

Nothing keeping you from an A

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

Check again

vpn.upenn.edu  Has IPv6

A (IPv4)128.91.172.62
AAAA (IPv6)2607:f470:0:2:0:4:56:3

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/w0h3oI2rbT · How we measure

Checked 2026-11-03 06:02:34 UTC. Full DNS report: dns.pizza/domain/vpn.upenn.edu · Age, certificate and blocklists: how.is/vpn.upenn.edu · JSON: /api/v1/vpn.upenn.edu