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.

15 hosts · 222 ms

HostCertsFirst seenLast seen
maschinensucher.de 4 2026-06-09 2026-10-08
service.maschinensucher.de 14 2026-05-02 2026-08-28
presse.maschinensucher.de 5 2026-05-23 2026-09-21
nue.maschinensucher.de 5 2026-05-23 2026-09-21
wqkygg.maschinensucher.de 4 2026-05-05 2026-09-13
blog.maschinensucher.de 1 2026-05-04 2026-05-04
www.blog.maschinensucher.de 1 2026-05-04 2026-05-04
lej.maschinensucher.de 6 2026-05-21 2026-09-18
local.maschinensucher.de 5 2026-05-07 2026-09-04
utm.maschinensucher.de 2 2026-05-11 2026-05-11
mta-sts.maschinensucher.de 4 2026-06-09 2026-10-08
systemtest.maschinensucher.de 5 2026-05-07 2026-09-03
www.maschinensucher.de 4 2026-06-09 2026-10-08
sandbox.maschinensucher.de 5 2026-05-07 2026-09-04
company.maschinensucher.de 6 2026-05-03 2026-08-29

Programmatic access: API GET /v1/hosts/maschinensucher.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/maschinensucher.de.