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.

20 hosts · 288 ms

HostCertsFirst seenLast seenDNS
galaxus.com 25 2026-04-16 2026-10-04 ok
*.galaxus.com 18 2026-04-16 2026-09-03 —
static10.galaxus.com 4 2026-04-21 2026-10-02 ok
static01.galaxus.com 3 2026-06-18 2026-08-31 ok
static02.galaxus.com 3 2026-06-18 2026-08-31 ok
static03.galaxus.com 3 2026-06-18 2026-08-31 ok
static04.galaxus.com 3 2026-06-18 2026-08-31 ok
static05.galaxus.com 3 2026-06-18 2026-08-31 ok
static06.galaxus.com 3 2026-06-18 2026-08-31 ok
static07.galaxus.com 3 2026-06-18 2026-08-31 ok
static08.galaxus.com 3 2026-06-18 2026-08-31 ok
static09.galaxus.com 3 2026-06-18 2026-08-31 ok
auth.galaxus.com 5 2026-04-13 2026-09-10 ok
test-auth.galaxus.com 5 2026-04-13 2026-09-10 ok
cmi.galaxus.com 2 2026-04-13 2026-09-29 nodata
open-app.galaxus.com 3 2026-06-18 2026-08-31 ok
test-open-app.galaxus.com 3 2026-06-18 2026-08-31 ok
ftp.galaxus.com 2 2025-08-12 2026-09-10 ok
live-chat.galaxus.com 2 2026-05-11 2026-05-11 nxdomain
www.galaxus.com 6 2026-04-13 2026-10-04 ok

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