Yes — dropbox.com has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
dropbox.com has an AAAA record and answers on it.
✓ 2620:100:6040:18::a27d:f812 answers · 443
yes
www over IPv6
www.dropbox.com has an AAAA record and answers on it.
✓ 2620:100:601c:18::a27d:612 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mxa-001ed902.gslb.pphosted.com ✗mxb-001ed902.gslb.pphosted.com ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns-1162.awsdns-17.org ✓ns-1949.awsdns-51.co.uk ✓ns-315.awsdns-39.com ✓ns-564.awsdns-06.net ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://dropbox.com/ via 2620:100:6040:18::a27d:f812 → 301https://www.dropbox.com/ via 2620:100:601c:18::a27d:612 → 200
works
 Load dropbox.com over IPv6 from up to six other places — a second opinion.

What's keeping dropbox.com from an A

  1. Mail servers without IPv6
    mxa-001ed902.gslb.pphosted.com, mxb-001ed902.gslb.pphosted.com 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

dropbox.com  Has IPv6

A (IPv4)162.125.248.18
AAAA (IPv6)2620:100:6040:18::a27d:f812

www.dropbox.com  Has IPv6

Alias ofwww-env.dropbox-dns.com
A (IPv4)162.125.6.18
AAAA (IPv6)2620:100:601c:18::a27d:612

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/Rvd6HEF538 · How we measure

Checked 2026-10-30 21:31:48 UTC. Full DNS report: dns.pizza/domain/dropbox.com · JSON: /api/v1/dropbox.com