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.

13 hosts · 221 ms

HostCertsFirst seenLast seen
atlasfin.com 19 2026-05-03 2026-10-08
*.atlasfin.com 10 2026-05-16 2026-10-08
pii.atlasfin.com 3 2026-05-07 2026-08-26
api.atlasfin.com 3 2026-05-18 2026-09-04
link.atlasfin.com 5 2026-05-16 2026-09-14
cdn.atlasfin.com 3 2026-06-06 2026-09-23
mp.atlasfin.com 3 2026-05-19 2026-09-02
app.atlasfin.com 3 2026-04-26 2026-08-20
fyg9ds.atlasfin.com 9 2026-06-01 2026-09-28
tools.atlasfin.com 3 2026-05-12 2026-08-28
*.tools.atlasfin.com 3 2026-05-12 2026-08-28
app.new.atlasfin.com 5 2026-05-24 2026-09-16
www.atlasfin.com 10 2026-04-19 2026-08-15

Programmatic access: API GET /v1/hosts/atlasfin.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/atlasfin.com.