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.

23 hosts · 377 ms

HostCertsFirst seenLast seenDNS
galaxus.eu 24 2026-04-13 2026-10-04 ok
*.galaxus.eu 18 2026-04-16 2026-09-03 —
data.galaxus.eu 4 2026-05-18 2026-10-04 ok
ub.galaxus.eu 4 2026-05-18 2026-10-04 ok
test-ub.galaxus.eu 5 2026-04-13 2026-09-10 ok
id.galaxus.eu 4 2026-05-18 2026-10-04 ok
test-id.galaxus.eu 5 2026-04-13 2026-09-10 ok
ud.galaxus.eu 4 2026-05-18 2026-10-04 ok
test-ud.galaxus.eu 5 2026-04-13 2026-09-10 ok
ftp-marketing.galaxus.eu 1 2025-08-12 2025-08-12 nodata
mli.galaxus.eu 7 2026-04-13 2026-09-29 ok
test-mli.galaxus.eu 7 2026-04-13 2026-09-29 ok
dev-mli.galaxus.eu 2 2026-04-13 2026-09-29 nodata
cmi.galaxus.eu 3 2026-04-13 2026-09-29 nodata
test-cmi.galaxus.eu 3 2026-04-13 2026-09-29 nodata
erp.galaxus.eu 7 2026-04-13 2026-09-29 ok
test-erp.galaxus.eu 7 2026-04-13 2026-09-29 ok
dev-erp.galaxus.eu 2 2026-04-13 2026-09-29 nodata
ftp.galaxus.eu 2 2025-08-12 2026-09-10 ok
partner.galaxus.eu 7 2026-04-13 2026-09-29 ok
test-partner.galaxus.eu 7 2026-04-13 2026-09-29 ok
dev-partner.galaxus.eu 2 2026-04-13 2026-09-29 nodata
www.galaxus.eu 6 2026-04-13 2026-10-04 ok

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