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.

11 hosts · 241 ms

HostCertsFirst seenLast seen
upmedik.com 6 2026-01-08 2026-10-03
*.upmedik.com 1 2026-01-08 2026-01-08
s3.upmedik.com 1 2026-01-08 2026-01-08
www.s3.upmedik.com 1 2026-01-08 2026-01-08
ai.upmedik.com 2 2026-04-25 2026-04-25
api.upmedik.com 2 2026-08-06 2026-10-05
www.api.upmedik.com 2 2026-08-06 2026-10-05
linkedin.upmedik.com 5 2026-05-27 2026-09-09
app.upmedik.com 1 2026-08-13 2026-08-13
www.app.upmedik.com 1 2026-08-13 2026-08-13
www.upmedik.com 6 2026-01-08 2026-10-03

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