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.

17 hosts · 241 ms

Download CSV
HostCertsFirst seenLast seen
plarium.com 33 2026-02-26 2026-10-02
*.plarium.com 20 2026-02-26 2026-10-02
asset-bridge.plarium.com 1 2026-10-07 2026-10-07
datadome.plarium.com 5 2026-04-30 2026-09-27
mg.store.plarium.com 5 2026-04-25 2026-08-23
faq.store.plarium.com 5 2026-04-25 2026-08-23
jenkins.il.plarium.com 5 2026-05-04 2026-10-13
1password-scim.plarium.com 4 2026-05-25 2026-09-10
vm-it-automation.plarium.com 4 2026-05-08 2026-08-24
it-automations.plarium.com 9 2026-04-27 2026-10-10
vm-it-automations.plarium.com 3 2026-05-09 2026-08-24
mecharena-support.plarium.com 5 2026-04-25 2026-08-23
raid-support.plarium.com 5 2026-04-25 2026-08-23
mobile-support.plarium.com 5 2026-04-25 2026-08-23
social-support.plarium.com 5 2026-04-25 2026-08-23
plariumplay-support.plarium.com 5 2026-04-25 2026-08-23
www.plarium.com 10 2026-05-24 2026-09-19

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