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.

3 hosts · 349 ms

HostCertsFirst seenLast seenDNS
shein.co.uk 3 2025-11-13 2026-02-10 ok
*.shein.co.uk 3 2025-11-13 2026-02-10 —
link.shein.co.uk 19 2026-05-03 2026-08-31 ok

Programmatic access, with DNS A records: API GET /v1/hosts/shein.co.uk (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/shein.co.uk.