Yes — scientificamerican.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
scientificamerican.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
✓ 2600:9000:28a0:800:12:7409:4340:93a1 answers · 443✓ 2600:9000:28a0:6000:12:7409:4340:93a1 answers · 443✓ 2600:9000:28a0:6c00:12:7409:4340:93a1 answers · 443✓ 2600:9000:28a0:a400:12:7409:4340:93a1 answers · 443– 2600:9000:28a0:8600:12:7409:4340:93a1 not tested– 2600:9000:28a0:ee00:12:7409:4340:93a1 not tested– 2600:9000:28a0:d200:12:7409:4340:93a1 not tested– 2600:9000:28a0:e00:12:7409:4340:93a1 not tested
yes
www over IPv6
www.scientificamerican.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
✓ 2600:9000:28a0:3e00:12:7409:4340:93a1 answers · 443✓ 2600:9000:28a0:e000:12:7409:4340:93a1 answers · 443✓ 2600:9000:28a0:9c00:12:7409:4340:93a1 answers · 443✓ 2600:9000:28a0:3200:12:7409:4340:93a1 answers · 443– 2600:9000:28a0:7c00:12:7409:4340:93a1 not tested– 2600:9000:28a0:2200:12:7409:4340:93a1 not tested– 2600:9000:28a0:6c00:12:7409:4340:93a1 not tested– 2600:9000:28a0:3600:12:7409:4340:93a1 not tested
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
null.scientificamerican.com ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns-1137.awsdns-14.org ✓ns-1733.awsdns-24.co.uk ✓ns-265.awsdns-33.com ✓ns-918.awsdns-50.net ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://scientificamerican.com/ via 2600:9000:28a0:800:12:7409:4340:93a1 → 301https://www.scientificamerican.com/ via 2600:9000:28a0:3e00:12:7409:4340:93a1 → 200
works
 Load scientificamerican.com over IPv6 from up to six other places — a second opinion.

What's keeping scientificamerican.com from an A

  1. Mail servers without IPv6
    null.scientificamerican.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

scientificamerican.com  Has IPv6

A (IPv4)3.171.38.37
3.171.38.86
3.171.38.114
3.171.38.19
AAAA (IPv6)2600:9000:28a0:800:12:7409:4340:93a1
2600:9000:28a0:6000:12:7409:4340:93a1
2600:9000:28a0:6c00:12:7409:4340:93a1
2600:9000:28a0:a400:12:7409:4340:93a1
2600:9000:28a0:8600:12:7409:4340:93a1
2600:9000:28a0:ee00:12:7409:4340:93a1
2600:9000:28a0:d200:12:7409:4340:93a1
2600:9000:28a0:e00:12:7409:4340:93a1

www.scientificamerican.com  Has IPv6

A (IPv4)3.171.38.19
3.171.38.86
3.171.38.114
3.171.38.37
AAAA (IPv6)2600:9000:28a0:3e00:12:7409:4340:93a1
2600:9000:28a0:e000:12:7409:4340:93a1
2600:9000:28a0:9c00:12:7409:4340:93a1
2600:9000:28a0:3200:12:7409:4340:93a1
2600:9000:28a0:7c00:12:7409:4340:93a1
2600:9000:28a0:2200:12:7409:4340:93a1
2600:9000:28a0:6c00:12:7409:4340:93a1
2600:9000:28a0:3600:12:7409:4340:93a1

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/07zLj-0I02 · How we measure

Checked 2026-10-31 22:29:15 UTC. Full DNS report: dns.pizza/domain/scientificamerican.com · JSON: /api/v1/scientificamerican.com