Yes — chess.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 chess.com has 4 IPv6 addresses and answers on every one we tested (1 more not tested). ✓ 2606:4700::6812:8a43 answers · 443✓ 2606:4700::6812:8d43 answers · 443✓ 2606:4700::6812:8943 answers · 443✓ 2606:4700::6812:8b43 answers · 443– 2606:4700::6812:8c43 not tested	yes
www over IPv6 www.chess.com has 4 IPv6 addresses and answers on every one we tested (1 more not tested). ✓ 2606:4700::6812:8a43 answers · 443✓ 2606:4700::6812:8c43 answers · 443✓ 2606:4700::6812:8b43 answers · 443✓ 2606:4700::6812:8943 answers · 443– 2606:4700::6812:8d43 not tested	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. aspmx.l.google.com ✓alt3.aspmx.l.google.com ✓alt4.aspmx.l.google.com ✓alt1.aspmx.l.google.com ✓alt2.aspmx.l.google.com ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. dan.ns.cloudflare.com ✓sue.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://chess.com/ via 2606:4700::6812:8a43 → 301https://www.chess.com/ via 2606:4700::6812:8a43 → 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/chess.com.svg)](https://aaaa.bot/chess.com)

Check again

chess.com Has IPv6

A (IPv4)	104.18.140.67 104.18.137.67 104.18.139.67 104.18.138.67 104.18.141.67
AAAA (IPv6)	2606:4700::6812:8a43 2606:4700::6812:8d43 2606:4700::6812:8943 2606:4700::6812:8b43 2606:4700::6812:8c43

www.chess.com Has IPv6

A (IPv4)	104.18.138.67 104.18.137.67 104.18.140.67 104.18.141.67 104.18.139.67
AAAA (IPv6)	2606:4700::6812:8a43 2606:4700::6812:8c43 2606:4700::6812:8b43 2606:4700::6812:8943 2606:4700::6812:8d43

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: chess.com
Measured 2026-10-31 05:04:32 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.18.140.67, 104.18.137.67, 104.18.139.67, 104.18.138.67, 104.18.141.67
AAAA (IPv6): 2606:4700::6812:8a43, 2606:4700::6812:8d43, 2606:4700::6812:8943, 2606:4700::6812:8b43, 2606:4700::6812:8c43
www AAAA:    2606:4700::6812:8a43, 2606:4700::6812:8c43, 2606:4700::6812:8b43, 2606:4700::6812:8943, 2606:4700::6812:8d43

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: chess.com has 4 IPv6 addresses and answers on every one we tested (1 more not tested).
    2606:4700::6812:8a43: answers (TCP 443)
    2606:4700::6812:8d43: answers (TCP 443)
    2606:4700::6812:8943: answers (TCP 443)
    2606:4700::6812:8b43: answers (TCP 443)
    2606:4700::6812:8c43: not tested
- www over IPv6: www.chess.com has 4 IPv6 addresses and answers on every one we tested (1 more not tested).
    2606:4700::6812:8a43: answers (TCP 443)
    2606:4700::6812:8c43: answers (TCP 443)
    2606:4700::6812:8b43: answers (TCP 443)
    2606:4700::6812:8943: answers (TCP 443)
    2606:4700::6812:8d43: not tested
- Mail servers (MX) have IPv6: Every mail server 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 after 1 redirect: HTTP 200.
    https://chess.com/ via 2606:4700::6812:8a43 -> HTTP 301, certificate: valid
    https://www.chess.com/ via 2606:4700::6812:8a43 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/YG9gLBCykV

Permanent link: aaaa.bot/r/YG9gLBCykV · How we measure

Checked 2026-10-31 05:04:32 UTC — one of the top 1,000 sites, re-checked weekly. Re-check now. Full DNS report: dns.pizza/domain/chess.com · JSON: /api/v1/chess.com