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.

30 hosts · 308 ms

HostCertsFirst seenLast seenDNS
seatgeek.com 38 2026-05-11 2026-09-24 ok
*.seatgeek.com 39 2025-12-03 2026-09-24 —
mnufc.seatgeek.com 1 2026-09-15 2026-09-15 ok
sportingkc.seatgeek.com 1 2026-09-15 2026-09-15 ok
brand.seatgeek.com 3 2026-05-07 2026-08-20 ok
afcrichmond.seatgeek.com 1 2026-09-15 2026-09-15 ok
chairnerd.seatgeek.com 5 2026-04-24 2026-08-22 ok
datadome.seatgeek.com 3 2026-05-20 2026-08-03 ok
enterprise.seatgeek.com 10 2026-05-19 2026-10-02 ok
*.enterprise.seatgeek.com 10 2026-05-19 2026-10-02 —
support.enterprise.seatgeek.com 1 2026-01-16 2026-01-16 ok
www.support.enterprise.seatgeek.com 1 2026-01-16 2026-01-16 nxdomain
kong-devportal-api.seatgeek.com 2 2026-05-09 2026-07-24 ok
*.sidekick.seatgeek.com 1 2025-12-03 2025-12-03 —
link.seatgeek.com 5 2026-05-30 2026-09-27 ok
portal.seatgeek.com 9 2026-05-27 2026-09-22 ok
sgtm.seatgeek.com 3 2026-05-31 2026-09-15 ok
mnufc-premium.seatgeek.com 1 2026-09-18 2026-09-18 ok
sportingkc-premium.seatgeek.com 1 2026-09-15 2026-09-15 ok
help.seatgeek.com 5 2026-05-05 2026-09-02 ok
mp.seatgeek.com 5 2026-05-29 2026-09-26 ok
broker.seatgeek.com 5 2026-05-05 2026-09-02 ok
email.jobs.seatgeek.com 5 2026-05-11 2026-09-08 ok
pages.seatgeek.com 7 2026-05-29 2026-09-25 ok
static-maps.seatgeek.com 10 2026-05-19 2026-09-30 ok
sgeprojects.seatgeek.com 5 2026-04-28 2026-08-27 ok
feroot.seatgeek.com 5 2026-05-06 2026-09-02 ok
support.seatgeek.com 5 2026-05-05 2026-09-02 ok
privacy.seatgeek.com 1 2026-01-29 2026-01-29 ok
buy.seatgeek.com 5 2026-05-03 2026-08-31 ok

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