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 · 282 ms

HostCertsFirst seenLast seenDNS
sotec.eu 10 2025-12-09 2026-08-31 ok
*.sotec.eu 5 2025-12-09 2026-03-10 —
shop.sotec.eu 1 2026-04-15 2026-04-15 ok
git.sotec.eu 5 2026-05-12 2026-09-15 ok
account.sotec.eu 2 2026-07-09 2026-07-09 nxdomain
www.sotec.eu 5 2026-05-03 2026-08-31 ok
legacy.sotec.eu 2 2026-05-03 2026-05-03 nxdomain
www.legacy.sotec.eu 2 2026-05-03 2026-05-03 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/sotec.eu (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/sotec.eu.