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.

9 hosts · 202 ms

HostCertsFirst seenLast seen
dustin.nl 11 2025-09-07 2026-09-08
*.dustin.nl 11 2025-09-07 2026-09-08
securecookiesdustininfo.dustin.nl 7 2026-05-01 2026-09-18
newdustineer.dustin.nl 5 2026-05-30 2026-09-25
fortianalyzer.services.dustin.nl 1 2025-09-10 2025-09-10
securecookies.dustin.nl 5 2026-04-16 2026-09-03
deals.dustin.nl 5 2026-06-03 2026-09-05
solutions.dustin.nl 6 2026-06-03 2026-10-01
applecommunity.dustin.nl 3 2026-05-26 2026-08-05

Programmatic access: API GET /v1/hosts/dustin.nl (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/dustin.nl.