Find every subdomain
of a domain.

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

18 hosts · 238 ms

HostCertsFirst seenLast seen
seats.aero 35 2025-09-29 2026-10-02
*.seats.aero 16 2025-09-29 2026-09-17
c.seats.aero 9 2026-06-07 2026-10-03
gold.seats.aero 18 2026-06-04 2026-10-03
circle.seats.aero 23 2026-05-28 2026-09-24
staging.seats.aero 6 2026-05-19 2026-05-19
merch.seats.aero 5 2026-04-16 2026-09-22
www.merch.seats.aero 5 2026-04-16 2026-09-22
storybook.seats.aero 17 2026-06-06 2026-10-03
platform.seats.aero 11 2026-05-26 2026-09-21
demo.seats.aero 7 2026-08-26 2026-08-26
help.seats.aero 13 2026-06-05 2026-10-02
docs.seats.aero 5 2026-05-03 2026-08-30
developers.seats.aero 14 2026-05-17 2026-09-12
status.seats.aero 7 2026-05-17 2026-09-13
www.seats.aero 12 2026-06-05 2026-10-01
x.seats.aero 16 2026-06-04 2026-10-03
pay.seats.aero 8 2026-04-22 2026-08-18

Programmatic access: API GET /v1/hosts/seats.aero (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/seats.aero.