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.

17 hosts · 284 ms

HostCertsFirst seenLast seenDNS
galaxus.fr 24 2026-04-13 2026-10-04 ok
*.galaxus.fr 18 2026-04-16 2026-09-03 —
data.galaxus.fr 4 2026-05-18 2026-10-04 ok
ub.galaxus.fr 4 2026-05-18 2026-10-04 ok
ud.galaxus.fr 4 2026-05-18 2026-10-04 ok
lnk.galaxus.fr 3 2026-06-09 2026-08-18 ok
helpcenter.galaxus.fr 5 2026-05-12 2026-09-09 ok
links.newsletter.galaxus.fr 3 2026-06-09 2026-08-18 ok
links.galaxus.fr 3 2026-06-09 2026-08-18 ok
links.notifications.galaxus.fr 3 2026-06-09 2026-08-18 ok
links.coupons.galaxus.fr 3 2026-06-09 2026-08-18 ok
links.productnews.galaxus.fr 3 2026-06-09 2026-08-18 ok
www.galaxus.fr 6 2026-04-13 2026-10-04 ok
test-www.galaxus.fr 7 2026-04-13 2026-09-29 ok
dev-www.galaxus.fr 2 2026-04-13 2026-09-29 nodata
links.community.galaxus.fr 3 2026-06-09 2026-08-18 ok
links.security.galaxus.fr 3 2026-06-09 2026-08-18 ok

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