Yes — box.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
box.com has an AAAA record and answers on it.
✓ 2620:117:bff0:12d:: answers · 443
yes
www over IPv6
www.box.com has 2 IPv6 addresses and answers on every one we tested.
✓ 2620:117:bfb0:21:: answers · 443✓ 2620:117:bfb0:20:: answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mxa-00172704.gslb.pphosted.com ✗mxb-00172704.gslb.pphosted.com ✗
no
Nameservers have IPv6
8 of 8 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
dns1.p09.nsone.net ✓dns2.p09.nsone.net ✓dns3.p09.nsone.net ✓dns4.p09.nsone.net ✓ns01.box-ns.com ✓ns02.box-ns.com ✓ns03.box-ns.com ✓ns04.box-ns.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://box.com/ via 2620:117:bff0:12d:: → 301https://www.box.com/ via 2620:117:bfb0:21:: → 200
works
 Load box.com over IPv6 from up to six other places — a second opinion.

What's keeping box.com from an A

  1. Mail servers without IPv6
    mxa-00172704.gslb.pphosted.com, mxb-00172704.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

box.com  Has IPv6

A (IPv4)74.112.186.157
AAAA (IPv6)2620:117:bff0:12d::

www.box.com  Has IPv6

Alias ofwww.box.com.cdn.cloudflare.net
A (IPv4)103.116.7.20
103.116.7.21
AAAA (IPv6)2620:117:bfb0:21::
2620:117:bfb0:20::

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/4okUapk4-0 · How we measure

Checked 2026-10-31 14:07:53 UTC. Full DNS report: dns.pizza/domain/box.com · JSON: /api/v1/box.com