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.

8 hosts · 341 ms

HostCertsFirst seenLast seenDNS
deliveroo.hk 46 2026-03-03 2026-09-25 ok
*.deliveroo.hk 46 2026-03-03 2026-09-25 —
*.order-staging.deliveroo.hk 12 2026-05-21 2026-09-16 —
*.staging.deliveroo.hk 10 2026-05-20 2026-09-15 —
*.order.deliveroo.hk 12 2026-05-21 2026-09-16 —
email.comms.deliveroo.hk 3 2026-07-24 2026-09-22 ok
careers.deliveroo.hk 4 2026-05-11 2026-05-18 ok
*.sandbox.deliveroo.hk 10 2026-05-20 2026-09-15 —

Programmatic access, with DNS A records: API GET /v1/hosts/deliveroo.hk (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/deliveroo.hk.