Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

55 hosts · 431 ms

HostCertsFirst seenLast seenDNS
chess.com 68 2026-04-09 2026-10-03 ok
*.chess.com 18 2026-05-01 2026-10-02 —
external.oauth2.chess.com 5 2026-05-07 2026-09-04 ok
live3.chess.com 4 2026-05-31 2026-09-15 ok
chess24.chess.com 11 2026-05-19 2026-09-14 ok
brand.chess.com 22 2026-04-20 2026-08-18 ok
variants-beta.gcp-prod.chess.com 10 2026-05-16 2026-09-13 ok
variants-beta-alb.gcp-prod.chess.com 5 2026-05-16 2026-09-13 ok
variants-alb.gcp-prod.chess.com 5 2026-05-27 2026-09-24 ok
ccc-api.gcp-prod.chess.com 5 2026-05-24 2026-09-21 ok
variants.gcp-prod.chess.com 10 2026-05-27 2026-09-24 ok
text-and-audio-service.chess.com 9 2026-06-07 2026-10-03 ok
speech-audio-service.chess.com 22 2026-04-18 2026-08-17 ok
assets-chess-engine.chess.com 12 2026-06-04 2026-09-30 ok
marketing.chess.com 11 2026-05-27 2026-09-22 ok
blog.chess.com 4 2026-04-17 2026-08-15 ok
merch.chess.com 4 2026-04-17 2026-08-15 ok
danielrensch.chess.com 8 2026-05-19 2026-09-14 ok
assets-sdui.chess.com 6 2026-05-01 2026-08-27 ok
sam.chess.com 6 2026-05-19 2026-09-14 ok
assets-design-system.chess.com 10 2026-04-29 2026-08-25 ok
esm.chess.com 4 2026-05-17 2026-07-15 nxdomain
newman.chess.com 5 2026-05-18 2026-09-14 nxdomain
text-and-audio-cdn.chess.com 12 2026-06-03 2026-09-30 ok
speech-audio-cdn.chess.com 10 2026-04-14 2026-08-10 ok
apple-app-site-association.chess.com 8 2026-05-11 2026-09-07 ok
well-known.chess.com 9 2026-05-20 2026-09-16 ok
seo.chess.com 3 2026-06-16 2026-08-15 ok
text-and-audio.chess.com 15 2026-06-03 2026-09-29 ok
sitemap.chess.com 10 2026-04-28 2026-08-25 ok
shop.chess.com 4 2026-04-17 2026-08-15 ok
er.chess.com 6 2026-05-06 2026-09-01 ok
twitterbanner.chess.com 12 2026-04-15 2026-08-12 ok
assets-flair.chess.com 10 2026-04-13 2026-08-10 ok
assets-configurator.chess.com 8 2026-05-13 2026-09-09 ok
proctor.chess.com 12 2026-04-23 2026-08-20 ok
client-metrics.chess.com 13 2026-05-21 2026-10-01 ok
assets-ds.chess.com 10 2026-05-06 2026-09-02 ok
services.chess.com 3 2026-05-03 2026-08-19 ok
client-packages.chess.com 12 2026-05-24 2026-09-19 ok
error-pages.chess.com 10 2026-04-09 2026-10-03 ok
assets-coaches.chess.com 10 2026-04-13 2026-08-10 ok
cccfiles.chess.com 5 2026-05-18 2026-09-14 ok
assets-themes.chess.com 6 2026-04-13 2026-08-10 ok
r2-assets-themes.chess.com 10 2026-04-14 2026-08-10 ok
assets-courses.chess.com 10 2026-04-21 2026-08-17 ok
pogchamps.chess.com 4 2026-04-17 2026-08-15 ok
assets-chess.chess.com 8 2026-05-06 2026-09-02 ok
assets-experiments.chess.com 8 2026-04-30 2026-08-26 ok
assets-bots.chess.com 2 2026-09-15 2026-09-15 ok
mx-sat.chess.com 7 2026-07-02 2026-08-30 ok
*.mx-sat.chess.com 7 2026-07-02 2026-08-30 —
nimble.broadcast.chess.com 3 2026-06-07 2026-08-07 ok
telos.broadcast.chess.com 2 2026-09-09 2026-09-09 ok
variants.gcp-sandbox.chess.com 10 2026-05-19 2026-09-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/chess.com (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/chess.com.