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 · 241 ms

HostCertsFirst seenLast seen
originusa.com 15 2026-04-18 2026-09-29
sales.originusa.com 13 2026-04-14 2026-09-27
sms.originusa.com 8 2026-05-11 2026-09-06
image.campaigns.originusa.com 2 2026-01-21 2026-01-21
returns.originusa.com 8 2026-05-16 2026-09-11
accounts.originusa.com 7 2026-04-20 2026-08-30
sv.originusa.com 14 2026-04-23 2026-09-03
www.originusa.com 15 2026-04-17 2026-09-29

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