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 · 588 ms

Download CSV
HostCertsFirst seenLast seen
extraloge.com 8 2026-05-02 2026-09-30
*.extraloge.com 8 2026-05-02 2026-09-30
um.extraloge.com 4 2026-04-25 2026-06-24
mta-sts.extraloge.com 4 2026-04-20 2026-08-17

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