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.

10 hosts · 225 ms

HostCertsFirst seenLast seen
staq.io 15 2025-07-13 2026-10-13
*.staq.io 17 2025-07-13 2026-10-13
jira.staq.io 1 2026-01-30 2026-01-30
internal.jira.staq.io 1 2026-01-30 2026-01-30
website.staq.io 14 2026-06-10 2026-10-06
connectors.staq.io 2 2026-07-23 2026-07-23
oauth2.connectors.staq.io 2 2026-07-23 2026-07-23
mcp.connectors.staq.io 1 2026-07-23 2026-07-23
hooks.connectors.staq.io 2 2026-07-23 2026-07-23
trust.staq.io 12 2026-05-16 2026-09-12

Programmatic access: API GET /v1/hosts/staq.io (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/staq.io.