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.

5 hosts · 268 ms

Download CSV
HostCertsFirst seenLast seen
airadvisor.com 24 2026-05-30 2026-09-29
*.airadvisor.com 24 2026-05-30 2026-09-29
url6632.airadvisor.com 2 2026-09-24 2026-09-24
devstatus.airadvisor.com 5 2026-05-18 2026-09-15
dev.airadvisor.com 5 2026-04-24 2026-08-22

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