Yes — fast.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 fast.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:c400:884::24fe answers · 443✓ 2600:1408:c400:885::24fe answers · 443	yes
www over IPv6 www.fast.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:c400:884::24fe answers · 443✓ 2600:1408:c400:885::24fe answers · 443	yes
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. a7-67.akam.net ✓a13-67.akam.net ✓a14-64.akam.net ✓a1-242.akam.net ✓a24-65.akam.net ✓a26-66.akam.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.

https://fast.com/ via 2600:1408:c400:884::24fe → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/fast.com.svg)](https://aaaa.bot/fast.com)

Check again

fast.com Has IPv6

A (IPv4)	184.27.2.83
AAAA (IPv6)	2600:1408:c400:884::24fe 2600:1408:c400:885::24fe

www.fast.com Has IPv6

A (IPv4)	184.27.2.83
AAAA (IPv6)	2600:1408:c400:884::24fe 2600:1408:c400:885::24fe

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: fast.com
Measured 2026-10-31 00:04:32 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    184.27.2.83
AAAA (IPv6): 2600:1408:c400:884::24fe, 2600:1408:c400:885::24fe
www AAAA:    2600:1408:c400:884::24fe, 2600:1408:c400:885::24fe

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: fast.com has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:c400:884::24fe: answers (TCP 443)
    2600:1408:c400:885::24fe: answers (TCP 443)
- www over IPv6: www.fast.com has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:c400:884::24fe: answers (TCP 443)
    2600:1408:c400:885::24fe: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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 200.
    https://fast.com/ via 2600:1408:c400:884::24fe -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/uZTBGX1ALR

Permanent link: aaaa.bot/r/uZTBGX1ALR · How we measure

Checked 2026-10-31 00:04:32 UTC — one of the top 1,000 sites, re-checked weekly. Re-check now. Full DNS report: dns.pizza/domain/fast.com · JSON: /api/v1/fast.com