Yes — us-east-1-instance-amazon.com has IPv6.

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

Measured 2026-11-01 14:55 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check us-east-1-instance-amazon.com now

IPv6 readiness

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

Website over IPv6 us-east-1-instance-amazon.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::6815:415f answers · 443✓ 2606:4700:3032::ac43:bdba answers · 443	yes
www over IPv6 www.us-east-1-instance-amazon.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::6815:415f answers · 443✓ 2606:4700:3032::ac43:bdba answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. _dc-mx.134e2d1f5548.us-east-1-instance-amazon.com ✗	no
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. lochlan.ns.cloudflare.com ✓paige.ns.cloudflare.com ✓	yes

First measured 2026-11-01; last confirmed 2026-11-01.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 404.

https://us-east-1-instance-amazon.com/ via 2606:4700:3032::6815:415f → 404

works

What's keeping us-east-1-instance-amazon.com from an A

Mail servers without IPv6
_dc-mx.134e2d1f5548.us-east-1-instance-amazon.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

us-east-1-instance-amazon.com Has IPv6

A (IPv4)	172.67.189.186 104.21.65.95
AAAA (IPv6)	2606:4700:3032::6815:415f 2606:4700:3032::ac43:bdba

www.us-east-1-instance-amazon.com Has IPv6

A (IPv4)	172.67.189.186 104.21.65.95
AAAA (IPv6)	2606:4700:3032::6815:415f 2606:4700:3032::ac43:bdba

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: us-east-1-instance-amazon.com
Measured 2026-11-01 14:55:33 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.189.186, 104.21.65.95
AAAA (IPv6): 2606:4700:3032::6815:415f, 2606:4700:3032::ac43:bdba
www AAAA:    2606:4700:3032::6815:415f, 2606:4700:3032::ac43:bdba

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: us-east-1-instance-amazon.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::6815:415f: answers (TCP 443)
    2606:4700:3032::ac43:bdba: answers (TCP 443)
- www over IPv6: www.us-east-1-instance-amazon.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::6815:415f: answers (TCP 443)
    2606:4700:3032::ac43:bdba: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: 2 of 2 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 404.
    https://us-east-1-instance-amazon.com/ via 2606:4700:3032::6815:415f -> HTTP 404, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/R5OhGYYq58

Permanent link: aaaa.bot/r/R5OhGYYq58 · How we measure

Checked 2026-11-01 14:55:33 UTC. Full DNS report: dns.pizza/domain/us-east-1-instance-amazon.com · JSON: /api/v1/us-east-1-instance-amazon.com