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.

6 hosts · 183 ms

HostCertsFirst seenLast seen
justpaddles.com 3 2025-06-10 2026-09-15
dd.justpaddles.com 1 2026-08-25 2026-08-25
engage.justpaddles.com 8 2026-04-24 2026-08-20
zzlgf.justpaddles.com 13 2026-06-07 2026-10-03
mailer.justpaddles.com 8 2026-04-24 2026-08-20
www.justpaddles.com 2 2025-06-10 2025-12-08

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