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.

6 hosts · 268 ms

HostCertsFirst seenLast seenDNS
eos-schweiz.com 21 2026-04-10 2026-10-04 ok
*.eos-schweiz.com 21 2026-04-10 2026-10-04 —
prod-serviceportal.eos-schweiz.com 1 2026-02-10 2026-02-10 ok
uat-serviceportal.eos-schweiz.com 1 2026-01-23 2026-01-23 ok
securetransfer.eos-schweiz.com 1 2025-11-11 2025-11-11 ok
eos-direct.eos-schweiz.com 3 2025-11-20 2026-10-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/eos-schweiz.com (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/eos-schweiz.com.