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.

24 hosts · 294 ms

HostCertsFirst seenLast seenDNS
booxi.eu 7 2026-04-18 2026-09-30 ok
*.booxi.eu 1 2026-06-15 2026-06-15 —
core.booxi.eu 8 2026-04-17 2026-09-27 ok
dev-core.booxi.eu 10 2026-04-11 2026-09-23 ok
se.booxi.eu 3 2026-05-30 2026-09-15 ok
dev-se.booxi.eu 4 2026-05-30 2026-09-13 ok
metabase.booxi.eu 3 2026-05-10 2026-08-26 ok
site.booxi.eu 3 2026-04-27 2026-08-16 ok
dev-site.booxi.eu 11 2026-05-10 2026-08-31 ok
api.booxi.eu 5 2026-04-19 2026-09-25 ok
dev-api.booxi.eu 5 2026-04-24 2026-10-06 ok
app.booxi.eu 3 2026-05-24 2026-09-09 ok
dev-app.booxi.eu 11 2026-04-25 2026-10-01 ok
partner.booxi.eu 4 2026-05-28 2026-09-18 ok
dev-partner.booxi.eu 5 2026-04-16 2026-09-24 ok
connector.booxi.eu 3 2026-05-26 2026-09-07 ok
dev-connector.booxi.eu 3 2026-05-24 2026-09-08 ok
labs.booxi.eu 3 2026-05-27 2026-09-13 ok
cs.booxi.eu 4 2026-05-28 2026-09-18 ok
dev-cs.booxi.eu 5 2026-04-16 2026-09-24 ok
account.booxi.eu 3 2026-06-01 2026-09-22 ok
dev-account.booxi.eu 3 2026-05-07 2026-08-24 ok
www.booxi.eu 6 2026-04-18 2026-09-30 ok
dev-www.booxi.eu 5 2026-04-13 2026-09-26 ok

Programmatic access, with DNS A records: API GET /v1/hosts/booxi.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/booxi.eu.