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.

14 hosts · 220 ms

HostCertsFirst seenLast seen
esto.eu 75 2026-01-13 2026-10-04
*.esto.eu 40 2026-04-25 2026-09-29
api-ph.esto.eu 24 2026-06-08 2026-10-05
global.esto.eu 4 2026-04-26 2026-04-26
mozello.esto.eu 3 2026-04-20 2026-07-20
plugin-app.esto.eu 9 2026-05-08 2026-10-09
plugins-log-collector.esto.eu 5 2026-04-30 2026-08-29
jobs.esto.eu 7 2026-06-30 2026-10-08
docs.esto.eu 14 2026-07-08 2026-09-05
careers.esto.eu 26 2026-05-29 2026-09-03
status.esto.eu 4 2026-06-10 2026-10-06
internal-status.esto.eu 17 2026-06-11 2026-10-07
data-prefect.esto.eu 17 2026-06-06 2026-10-03
www.esto.eu 21 2026-06-04 2026-10-01

Programmatic access: API GET /v1/hosts/esto.eu (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/esto.eu.