Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

4 hosts · 309 ms

HostCertsFirst seenLast seenDNS
amijag.com 6 2026-04-18 2026-09-27 ok
cdn.amijag.com 2 2026-03-27 2026-08-07 ok
jobs.amijag.com 1 2026-01-29 2026-01-29 nxdomain
www.amijag.com 6 2026-04-18 2026-09-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/amijag.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/amijag.com.