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.

8 hosts · 246 ms

HostCertsFirst seenLast seen
adquick.com 14 2026-05-14 2026-09-09
*.adquick.com 14 2026-05-14 2026-09-09
api.adquick.com 10 2026-04-17 2026-08-13
meetadquick.adquick.com 5 2026-05-10 2026-09-12
docs.adquick.com 6 2026-05-12 2026-09-07
analytics-appevents.adquick.com 3 2026-05-14 2026-08-30
madconnect.adquick.com 3 2026-05-19 2026-09-05
trust.adquick.com 6 2026-04-20 2026-08-16

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