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.

12 hosts · 280 ms

Download CSV
HostCertsFirst seenLast seen
zukenusa.com 10 2026-04-20 2026-09-29
*.zukenusa.com 10 2026-04-20 2026-09-29
secure2.zukenusa.com 2 2026-05-26 2026-05-26
kb.zukenusa.com 5 2026-05-19 2026-09-16
website.zukenusa.com 7 2026-04-29 2026-09-17
training.zukenusa.com 5 2026-05-13 2026-09-26
gpvpn.zukenusa.com 1 2026-05-01 2026-05-01
www.gpvpn.zukenusa.com 1 2026-05-01 2026-05-01
ftp.zukenusa.com 2 2026-05-26 2026-05-26
itar.zukenusa.com 2 2026-05-26 2026-05-26
www.itar.zukenusa.com 2 2026-05-26 2026-05-26
community.zukenusa.com 5 2026-05-09 2026-09-06

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