Find every subdomain
of a domain.

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

14 hosts · 278 ms

HostCertsFirst seenLast seen
ergon.com.au 16 2026-04-27 2026-08-23
et.em.ergon.com.au 6 2026-04-28 2026-08-24
www.lp.ergon.com.au 8 2026-04-30 2026-08-26
epp.ergon.com.au 2 2025-10-27 2025-10-27
energyanalysis.ergon.com.au 2 2025-10-23 2025-11-04
*.energyanalysis.ergon.com.au 1 2025-11-04 2025-11-04
www.energyanalysis.ergon.com.au 2 2025-10-23 2025-11-04
apps.ergon.com.au 5 2026-03-27 2026-10-02
calculators.ergon.com.au 1 2025-12-23 2025-12-23
uat.calculators.ergon.com.au 1 2025-12-23 2025-12-23
dev.calculators.ergon.com.au 1 2025-12-22 2025-12-22
myaccount.ergon.com.au 2 2025-10-12 2026-09-12
stagemyaccount.ergon.com.au 2 2025-10-12 2026-09-12
www.ergon.com.au 12 2026-04-27 2026-08-23

Programmatic access: API GET /v1/hosts/ergon.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/ergon.com.au.