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 · 223 ms

HostCertsFirst seenLast seen
amboretto.com 6 2026-02-11 2026-08-29
*.amboretto.com 6 2026-02-11 2026-08-29
mkt.amboretto.com 6 2026-05-06 2026-09-01
www.amboretto.com 8 2026-05-07 2026-09-02

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