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.

10 hosts · 271 ms

HostCertsFirst seenLast seenDNS
nextclinic.com.au 10 2025-10-30 2026-09-30 ok
*.nextclinic.com.au 4 2025-10-30 2026-09-30 —
f.nextclinic.com.au 16 2026-05-27 2026-09-23 ok
stg.nextclinic.com.au 5 2026-05-18 2026-09-19 ok
api.stg.nextclinic.com.au 2 2025-10-29 2026-09-29 ok
auth.nextclinic.com.au 10 2026-04-24 2026-08-21 ok
content.nextclinic.com.au 4 2026-04-08 2026-08-13 ok
dev.nextclinic.com.au 4 2026-04-11 2026-08-09 ok
www.nextclinic.com.au 5 2026-05-20 2026-09-21 ok
pay.nextclinic.com.au 10 2026-04-21 2026-08-17 ok

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