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.

8 hosts · 265 ms

Download CSV
HostCertsFirst seenLast seen
onlineshoes.com 1 2025-10-09 2025-10-09
stg.onlineshoes.com 12 2026-05-25 2026-07-23
loadteststg.onlineshoes.com 12 2026-05-26 2026-07-24
cloud.email.onlineshoes.com 1 2026-02-08 2026-02-08
image.email.onlineshoes.com 4 2026-03-30 2026-09-29
click.email.onlineshoes.com 1 2026-02-08 2026-02-08
view.email.onlineshoes.com 1 2026-02-08 2026-02-08
www.onlineshoes.com 10 2026-04-30 2026-08-27

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