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 · 182 ms

HostCertsFirst seenLast seen
poolpro.com.au 28 2026-04-20 2026-10-01
*.poolpro.com.au 10 2026-05-27 2026-10-01
website.poolpro.com.au 5 2026-05-11 2026-09-11
marketing.poolpro.com.au 13 2026-04-30 2026-10-05
shop.poolpro.com.au 3 2026-04-09 2026-09-29
www.shop.poolpro.com.au 3 2026-04-09 2026-09-29
mta-sts.poolpro.com.au 5 2026-05-23 2026-09-20
www.poolpro.com.au 12 2026-04-20 2026-08-05

Programmatic access: API GET /v1/hosts/poolpro.com.au (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/poolpro.com.au.