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.

12 hosts · 268 ms

HostCertsFirst seenLast seen
freshstep.com 5 2026-05-29 2026-09-30
qa.freshstep.com 5 2026-05-11 2026-09-10
dccsigned.freshstep.com 5 2026-05-14 2026-09-11
brand.freshstep.com 2 2025-08-09 2026-07-08
storybook.freshstep.com 4 2026-04-21 2026-08-25
*.em.freshstep.com 2 2025-08-17 2026-07-18
lp.freshstep.com 3 2025-08-01 2026-08-27
www.lp.freshstep.com 2 2025-08-01 2025-08-01
healthmonitor.freshstep.com 5 2026-05-05 2026-09-24
www.healthmonitor.freshstep.com 5 2026-05-05 2026-09-24
www.freshstep.com 5 2026-05-29 2026-09-29
*.tx.freshstep.com 2 2025-11-04 2026-10-05

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