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.

19 hosts · 312 ms

HostCertsFirst seenLast seenDNS
sunlife.com.vn 4 2025-08-28 2026-06-19 ok
landingpage.sunlife.com.vn 10 2026-04-17 2026-08-13 ok
online.sunlife.com.vn 4 2025-08-28 2026-06-19 ok
sso-stg.sunlife.com.vn 4 2025-08-13 2026-08-20 ok
email.sunlife.com.vn 10 2026-04-18 2026-08-14 ok
sso.sunlife.com.vn 3 2025-08-13 2026-08-20 ok
smetrics.sunlife.com.vn 4 2025-09-08 2026-09-10 ok
apps.sunlife.com.vn 2 2026-06-16 2026-06-19 nodata
target.sunlife.com.vn 2 2025-10-21 2025-10-21 ok
www.sunlife.com.vn 3 2025-08-28 2026-06-19 ok
sit2-www.sunlife.com.vn 10 2025-08-05 2026-05-12 ok
stagecld-www.sunlife.com.vn 3 2026-08-07 2026-10-06 nxdomain
sitcld-www.sunlife.com.vn 3 2026-08-07 2026-10-06 nxdomain
stage-www.sunlife.com.vn 3 2025-09-18 2026-10-05 ok
sit-www.sunlife.com.vn 3 2025-09-18 2026-10-05 ok
preview-www.sunlife.com.vn 3 2026-08-07 2026-10-06 nxdomain
sandbox.sunlife.com.vn 7 2026-04-02 2026-10-06 ok
academy-sandbox.sunlife.com.vn 5 2026-05-15 2026-09-12 ok
academy.sunlife.com.vn 2 2026-04-15 2026-05-05 ok

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