Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

9 hosts · 311 ms

HostCertsFirst seenLast seenDNS
kaigoagent.com 9 2025-06-09 2026-08-23 ok
*.kaigoagent.com 7 2025-08-07 2026-08-23 —
edge.kaigoagent.com 2 2025-07-16 2026-06-16 nodata
*.edge.kaigoagent.com 2 2025-07-16 2026-06-16 —
click.kaigoagent.com 2 2025-11-17 2025-11-17 ok
sgtm.kaigoagent.com 3 2026-04-30 2026-08-13 ok
development-sgtm.kaigoagent.com 4 2026-04-25 2026-10-03 ok
development.kaigoagent.com 4 2025-07-12 2026-06-13 ok
*.development.kaigoagent.com 4 2025-07-12 2026-06-13 —

Programmatic access, with DNS A records: API GET /v1/hosts/kaigoagent.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/kaigoagent.com.