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.

12 hosts · 254 ms

HostCertsFirst seenLast seen
iquasar.com 10 2026-04-19 2026-09-27
*.iquasar.com 9 2026-04-25 2026-09-27
conversentra.iquasar.com 2 2025-08-05 2026-07-06
unsubscribe.iquasar.com 5 2026-04-26 2026-08-25
knowledge.iquasar.com 12 2026-04-22 2026-08-18
software.iquasar.com 1 2026-04-19 2026-04-19
leitmotif.software.iquasar.com 2 2026-02-25 2026-07-15
staffing.iquasar.com 2 2026-04-17 2026-10-12
www.staffing.iquasar.com 2 2026-04-17 2026-10-12
resources.iquasar.com 10 2026-04-22 2026-08-18
www.iquasar.com 1 2026-04-19 2026-04-19
community.iquasar.com 5 2026-05-20 2026-09-17

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