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 · 280 ms

HostCertsFirst seenLast seenDNS
beating-beta.de 6 2026-02-05 2026-08-21 ok
*.beating-beta.de 1 2026-02-05 2026-02-05 —
2051002622.beating-beta.de 10 2026-06-05 2026-10-01 ok
dashboard.beating-beta.de 3 2026-06-16 2026-08-15 ok
13f.beating-beta.de 6 2026-05-26 2026-07-24 ok
ai.beating-beta.de 4 2026-04-11 2026-08-09 ok
trk.beating-beta.de 7 2026-06-02 2026-09-28 ok
klaviyo.beating-beta.de 14 2026-04-27 2026-08-23 ok
lp.beating-beta.de 3 2026-06-05 2026-08-04 ok
stocks.beating-beta.de 5 2026-05-23 2026-09-21 ok
socials.beating-beta.de 1 2026-09-26 2026-09-26 ok
img.mails.beating-beta.de 16 2026-05-02 2026-08-28 ok
r.mails.beating-beta.de 3 2026-06-01 2026-08-20 ok
status.beating-beta.de 4 2026-04-13 2026-08-10 ok
t.beating-beta.de 5 2026-05-30 2026-09-27 ok
support.beating-beta.de 10 2026-04-21 2026-08-17 ok
www.beating-beta.de 5 2026-04-23 2026-08-21 ok

Programmatic access, with DNS A records: API GET /v1/hosts/beating-beta.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/beating-beta.de.