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 · 229 ms

HostCertsFirst seenLast seen
atech.cloud 19 2025-10-03 2026-10-09
*.atech.cloud 19 2025-10-03 2026-10-09
hub.atech.cloud 2 2026-03-10 2026-07-19
portal.atech.cloud 4 2025-07-31 2026-08-01
www.portal.atech.cloud 4 2025-07-31 2026-08-01
go.atech.cloud 10 2026-05-03 2026-09-30
atech-portfolio.atech.cloud 1 2026-05-13 2026-05-13
help.atech.cloud 4 2025-08-07 2026-08-08
www.help.atech.cloud 4 2025-08-07 2026-08-08
stocks.atech.cloud 2 2026-05-05 2026-08-28
people-skills.atech.cloud 2 2026-05-14 2026-09-14
kqlens.atech.cloud 1 2026-09-21 2026-09-21

Programmatic access: API GET /v1/hosts/atech.cloud (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/atech.cloud.