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.

5 hosts · 229 ms

HostCertsFirst seenLast seen
suitespottechnology.com 16 2026-05-16 2026-09-11
blog.suitespottechnology.com 8 2026-04-24 2026-08-20
resources.suitespottechnology.com 10 2026-04-25 2026-08-22
mta-sts.suitespottechnology.com 4 2026-04-20 2026-08-18
www.suitespottechnology.com 8 2026-04-24 2026-08-20

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