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.

20 hosts · 190 ms

HostCertsFirst seenLast seen
simbase.com 9 2025-07-09 2026-07-20
*.simbase.com 10 2025-07-09 2026-07-20
api.dashboard.simbase.com 1 2025-12-24 2025-12-24
store.simbase.com 1 2025-08-18 2025-08-18
*.store.simbase.com 1 2025-08-18 2025-08-18
web-api.simbase.com 1 2025-07-31 2025-07-31
fwtrack.simbase.com 86 2026-05-02 2026-10-05
email.simbase.com 2 2026-03-29 2026-08-29
crm.simbase.com 8 2026-05-02 2026-08-28
hikvision.simbase.com 1 2025-08-17 2025-08-17
developer.simbase.com 2 2026-02-28 2026-07-16
docs.simbase.com 5 2026-05-29 2026-09-27
partners.simbase.com 2 2026-05-12 2026-05-12
secrets.simbase.com 2 2026-06-08 2026-06-08
status.simbase.com 6 2026-04-14 2026-08-17
email.account.simbase.com 3 2026-05-23 2026-09-12
email.iot.simbase.com 2 2026-03-25 2026-08-25
start.simbase.com 1 2026-02-14 2026-02-14
support.simbase.com 4 2026-06-10 2026-08-08
sst.simbase.com 4 2026-04-20 2026-08-18

Programmatic access: API GET /v1/hosts/simbase.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/simbase.com.