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.

6 hosts · 311 ms

Download CSV
HostCertsFirst seenLast seen
medium-cartomancy.com 16 2026-06-13 2026-10-09
*.medium-cartomancy.com 16 2026-06-13 2026-10-09
cro2.c.medium-cartomancy.com 5 2026-05-04 2026-08-31
mar2.m.medium-cartomancy.com 5 2026-05-03 2026-08-31
reg2.r.medium-cartomancy.com 5 2026-05-03 2026-08-31
tra2.t.medium-cartomancy.com 5 2026-05-03 2026-08-31

Programmatic access: API GET /v1/hosts/medium-cartomancy.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/medium-cartomancy.com.