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.

20 hosts · 287 ms

HostCertsFirst seenLast seenDNS
greatbiggameshow.com 40 2026-04-20 2026-09-26 ok
*.greatbiggameshow.com 18 2026-04-20 2026-09-25 —
store.greatbiggameshow.com 11 2026-04-17 2026-09-27 ok
checkin-staging.greatbiggameshow.com 6 2026-06-01 2026-10-03 ok
highlights-staging.greatbiggameshow.com 4 2026-07-31 2026-10-01 ok
survey-staging.greatbiggameshow.com 4 2026-07-31 2026-10-01 ok
api-stg.greatbiggameshow.com 5 2026-05-01 2026-08-29 ok
chippy-stg.greatbiggameshow.com 5 2026-05-05 2026-09-05 ok
api.greatbiggameshow.com 2 2025-10-02 2026-09-02 ok
cdn.greatbiggameshow.com 8 2026-05-13 2026-09-08 ok
checkin.greatbiggameshow.com 5 2026-05-31 2026-10-02 ok
exp.greatbiggameshow.com 8 2026-04-30 2026-08-26 ok
*.exp.greatbiggameshow.com 8 2026-04-30 2026-08-26 —
updater.greatbiggameshow.com 5 2026-04-23 2026-08-26 ok
assets.greatbiggameshow.com 2 2025-10-20 2025-10-20 nxdomain
highlights.greatbiggameshow.com 4 2026-07-29 2026-10-01 ok
assets-dev.greatbiggameshow.com 1 2025-10-20 2025-10-20 nxdomain
www.greatbiggameshow.com 5 2026-04-24 2026-08-25 ok
survey.greatbiggameshow.com 3 2026-07-24 2026-09-25 ok
chippy.greatbiggameshow.com 3 2026-06-13 2026-08-12 ok

Programmatic access, with DNS A records: API GET /v1/hosts/greatbiggameshow.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/greatbiggameshow.com.