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.

5 hosts · 255 ms

HostCertsFirst seenLast seenDNS
payme.com.au 8 2026-05-02 2026-09-11 ok
mta-sts.payme.com.au 1 2026-10-01 2026-10-01 ok
www.payme.com.au 6 2026-05-02 2026-09-11 ok
notify.payme.com.au 8 2026-09-11 2026-10-01 nodata
*.notify.payme.com.au 8 2026-09-11 2026-10-01 —

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