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.

18 hosts · 272 ms

HostCertsFirst seenLast seen
bugnion.eu 7 2025-12-12 2026-10-01
*.bugnion.eu 6 2026-04-19 2026-10-01
b3000-private.bugnion.eu 2 2026-04-08 2026-09-24
www.b3000-private.bugnion.eu 2 2026-04-08 2026-09-24
accounting.bugnion.eu 1 2025-12-17 2025-12-17
www.accounting.bugnion.eu 1 2025-12-17 2025-12-17
b3000-stg.bugnion.eu 1 2026-02-13 2026-02-13
www.b3000-stg.bugnion.eu 1 2026-02-13 2026-02-13
vpnmi.bugnion.eu 2 2026-05-14 2026-05-22
www.vpnmi.bugnion.eu 2 2026-05-14 2026-05-22
email.bugnion.eu 12 2026-04-23 2026-08-20
vpnbo.bugnion.eu 2 2026-05-14 2026-05-15
www.vpnbo.bugnion.eu 2 2026-05-14 2026-05-15
lp.bugnion.eu 14 2026-04-22 2026-08-20
hubspot.bugnion.eu 5 2026-05-18 2026-09-15
b3000-dev.bugnion.eu 1 2026-02-13 2026-02-13
www.b3000-dev.bugnion.eu 1 2026-02-13 2026-02-13
www.bugnion.eu 1 2025-12-12 2025-12-12

Programmatic access: API GET /v1/hosts/bugnion.eu (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/bugnion.eu.