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.

16 hosts · 303 ms

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HostCertsFirst seenLast seen
automationstudio.com 12 2025-08-21 2026-09-26
aslive.automationstudio.com 3 2025-09-29 2026-07-30
www.aslive.automationstudio.com 3 2025-09-29 2026-07-30
img.automationstudio.com 16 2026-04-30 2026-08-26
img.innovation.automationstudio.com 16 2026-04-29 2026-08-25
r.innovation.automationstudio.com 3 2026-06-25 2026-09-14
help.automationstudio.com 2 2025-10-04 2026-10-05
www.help.automationstudio.com 2 2025-10-04 2026-10-05
r.automationstudio.com 3 2026-06-14 2026-09-02
viewer.automationstudio.com 6 2025-12-05 2026-01-16
www.viewer.automationstudio.com 6 2025-12-05 2026-01-16
catalogues.automationstudio.com 2 2025-12-09 2026-01-08
www.catalogues.automationstudio.com 2 2025-12-09 2026-01-08
img.news.automationstudio.com 8 2026-05-07 2026-09-02
r.news.automationstudio.com 3 2026-06-27 2026-09-15
www.automationstudio.com 11 2025-08-21 2026-09-26

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