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.

12 hosts · 234 ms

HostCertsFirst seenLast seenDNS
up.com.au 3 2025-12-17 2025-12-18 ok
*.up.com.au 4 2025-12-17 2025-12-18 —
welcomehome.up.com.au 5 2025-10-23 2026-09-24 ok
*.welcomehome.up.com.au 5 2025-10-23 2026-09-24 —
metabase.up.com.au 3 2026-05-15 2026-09-01 ok
api.up.com.au 3 2026-06-17 2026-10-04 ok
drdrill-api.up.com.au 2 2026-06-24 2026-06-24 nodata
dr-test-api.up.com.au 2 2026-06-22 2026-06-22 nodata
link.up.com.au 4 2026-04-12 2026-09-11 ok
payee-verification.up.com.au 1 2026-01-05 2026-01-05 nodata
metabase-app.up.com.au 3 2026-05-15 2026-09-01 ok
developer.up.com.au 2 2026-07-30 2026-09-23 ok

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