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 · 318 ms

HostCertsFirst seenLast seenDNS
materialsdirect.ie 3 2025-11-21 2026-09-24 ok
*.materialsdirect.ie 2 2026-04-24 2026-09-24 —
mail.materialsdirect.ie 1 2026-04-06 2026-04-06 ok
autodiscover.materialsdirect.ie 1 2026-04-06 2026-04-06 ok
www.materialsdirect.ie 3 2025-11-21 2026-09-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/materialsdirect.ie (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/materialsdirect.ie.