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.

4 hosts · 221 ms

HostCertsFirst seenLast seen
sanabulsports.com 15 2026-05-16 2026-09-25
emailpreferences.sanabulsports.com 8 2026-05-07 2026-09-03
account.sanabulsports.com 15 2026-05-28 2026-10-07
www.sanabulsports.com 14 2026-05-15 2026-09-26

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