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.

2 hosts · 252 ms

HostCertsFirst seenLast seenDNS
sunlife.com.my 2 2026-06-11 2026-06-11 ok
www.sunlife.com.my 4 2026-04-17 2026-10-06 ok

Programmatic access, with DNS A records: API GET /v1/hosts/sunlife.com.my (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/sunlife.com.my.