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.

16 hosts · 320 ms

HostCertsFirst seenLast seen
beams.tech 1 2026-01-28 2026-01-28
*.beams.tech 1 2026-09-30 2026-09-30
us.auth.beams.tech 2 2025-09-21 2026-08-22
eu.auth.beams.tech 2 2025-09-21 2026-08-22
api.beams.tech 2 2025-09-25 2026-08-26
eu-central-1.api.beams.tech 2 2025-09-17 2026-08-18
us.api.beams.tech 2 2025-09-21 2026-08-22
us.websocket.api.beams.tech 2 2025-07-04 2026-06-04
eu.websocket.api.beams.tech 2 2025-07-04 2026-06-04
eu.api.beams.tech 2 2025-09-21 2026-08-22
feedback.beams.tech 9 2026-06-02 2026-09-28
app.beams.tech 5 2025-10-21 2026-09-30
us.api.thalamus.beams.tech 4 2026-05-07 2026-10-07
eu.api.thalamus.beams.tech 4 2026-05-07 2026-10-07
cockpit.beams.tech 1 2025-11-24 2025-11-24
www.beams.tech 1 2026-01-28 2026-01-28

Programmatic access: API GET /v1/hosts/beams.tech (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/beams.tech.