Yes — hm.com has IPv6.

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

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 hm.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:c400:11::17cd:6b4a answers · 443✓ 2600:1408:c400:11::17cd:6b4f answers · 443	yes
www over IPv6 www.hm.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:c400:11::17cd:6b5a answers · 443✓ 2600:1408:c400:11::17cd:6b4f answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. hm-com.mail.protection.outlook.com ✗	no
Nameservers have IPv6 6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. a1-139.akam.net ✓a12-67.akam.net ✓a11-66.akam.net ✓a8-66.akam.net ✓a5-65.akam.net ✓a28-64.akam.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.

https://hm.com/ via 2600:1408:c400:11::17cd:6b4a → 403

works

What's keeping hm.com from an A

Mail servers without IPv6
hm-com.mail.protection.outlook.com has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

hm.com Has IPv6

A (IPv4)	23.53.35.137 23.53.35.139
AAAA (IPv6)	2600:1408:c400:11::17cd:6b4a 2600:1408:c400:11::17cd:6b4f

www.hm.com Has IPv6

Alias of	www.hm.com.edgekey.net → e373839.dsca.akamaiedge.net
A (IPv4)	23.53.35.147 23.53.35.135
AAAA (IPv6)	2600:1408:c400:11::17cd:6b5a 2600:1408:c400:11::17cd:6b4f

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: hm.com
Measured 2026-10-31 07:04:31 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    23.53.35.137, 23.53.35.139
AAAA (IPv6): 2600:1408:c400:11::17cd:6b4a, 2600:1408:c400:11::17cd:6b4f
www AAAA:    2600:1408:c400:11::17cd:6b5a, 2600:1408:c400:11::17cd:6b4f

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: hm.com has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:c400:11::17cd:6b4a: answers (TCP 443)
    2600:1408:c400:11::17cd:6b4f: answers (TCP 443)
- www over IPv6: www.hm.com has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:c400:11::17cd:6b5a: answers (TCP 443)
    2600:1408:c400:11::17cd:6b4f: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: 6 of 6 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 403.
    https://hm.com/ via 2600:1408:c400:11::17cd:6b4a -> HTTP 403, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/MFhK2prV3h

Permanent link: aaaa.bot/r/MFhK2prV3h · How we measure

Checked 2026-10-31 07:04:31 UTC — one of the top 1,000 sites, re-checked weekly. Re-check now. Full DNS report: dns.pizza/domain/hm.com · JSON: /api/v1/hm.com