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.

42 hosts · 209 ms

HostCertsFirst seenLast seen
united-domains.de 2 2026-01-05 2026-01-05
smxint1.united-domains.de 7 2026-05-04 2026-10-01
smxint2.united-domains.de 14 2026-05-04 2026-10-01
smxint3.united-domains.de 14 2026-05-04 2026-10-01
web.united-domains.de 16 2026-05-30 2026-09-25
oc.united-domains.de 1 2026-08-31 2026-08-31
hed.united-domains.de 1 2026-01-19 2026-01-19
id.united-domains.de 3 2026-05-05 2026-05-05
close.united-domains.de 6 2026-04-14 2026-09-11
www.close.united-domains.de 6 2026-04-14 2026-09-11
presse.united-domains.de 4 2026-04-21 2026-08-19
simg.united-domains.de 2 2026-05-13 2026-08-28
archiving.united-domains.de 1 2026-04-14 2026-04-14
www.archiving.united-domains.de 1 2026-04-14 2026-04-14
blog.united-domains.de 5 2026-05-18 2026-09-15
test.blog.united-domains.de 2 2025-09-11 2026-09-11
rankingcoach.united-domains.de 1 2026-02-05 2026-02-05
www.rankingcoach.united-domains.de 1 2026-02-05 2026-02-05
w50hoh.united-domains.de 5 2026-05-26 2026-09-23
ai.united-domains.de 1 2026-07-17 2026-07-17
*.ai.united-domains.de 1 2026-07-17 2026-07-17
dnsapi.united-domains.de 1 2025-11-11 2025-11-11
feedback.united-domains.de 7 2026-04-26 2026-08-25
e.feedback.united-domains.de 4 2026-05-13 2026-07-28
link.email.united-domains.de 5 2026-04-27 2026-08-24
newsroom.united-domains.de 5 2026-04-29 2026-08-27
blog-6psip86rpm.united-domains.de 2 2025-07-10 2026-07-11
help-6psip86rpm.united-domains.de 2 2025-07-10 2026-07-11
acn.united-domains.de 3 2025-11-12 2025-11-13
ressourcen.united-domains.de 14 2026-05-25 2026-09-20
info.united-domains.de 4 2026-04-20 2026-08-18
help.united-domains.de 5 2026-05-18 2026-09-15
registrar.united-domains.de 1 2026-04-07 2026-04-07
www.registrar.united-domains.de 1 2026-04-07 2026-04-07
ai-builder.united-domains.de 1 2026-10-01 2026-10-01
*.preview.ai-builder.united-domains.de 1 2026-10-01 2026-10-01
newsletter.united-domains.de 4 2026-04-21 2026-08-19
ias.united-domains.de 5 2025-08-26 2026-08-21
stats.united-domains.de 4 2026-06-19 2026-08-18
www.stats.united-domains.de 1 2026-06-19 2026-06-19
surveys.united-domains.de 1 2026-05-27 2026-05-27
www.united-domains.de 2 2026-01-05 2026-01-05

Programmatic access: API GET /v1/hosts/united-domains.de (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/united-domains.de.