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.

7 hosts · 306 ms

HostCertsFirst seenLast seenDNS
biz-lynx.com.au 5 2025-12-04 2026-10-03 ok
365.biz-lynx.com.au 4 2026-02-22 2026-10-06 ok
myportal.biz-lynx.com.au 2 2025-12-04 2026-08-28 ok
www.myportal.biz-lynx.com.au 1 2025-12-04 2025-12-04 nxdomain
rmm.biz-lynx.com.au 4 2026-06-03 2026-10-03 ok
connect.biz-lynx.com.au 4 2026-06-03 2026-10-03 ok
www.biz-lynx.com.au 5 2025-12-04 2026-10-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/biz-lynx.com.au (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/biz-lynx.com.au.