Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

10 hosts · 217 ms

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HostCertsFirst seenLast seen
digitalsign.pt 16 2025-06-17 2026-06-23
*.digitalsign.pt 33 2025-06-17 2026-09-14
*.intranet.digitalsign.pt 25 2025-06-17 2026-09-14
mkt.digitalsign.pt 5 2026-05-01 2026-09-01
www-dev.digitalsign.pt 25 2025-06-17 2026-09-14
verify-dev.digitalsign.pt 1 2025-11-26 2025-11-26
*.verify-dev.digitalsign.pt 1 2025-11-26 2025-11-26
www.digitalsign.pt 8 2025-06-17 2026-06-23
verify.digitalsign.pt 2 2025-11-21 2025-11-21
*.verify.digitalsign.pt 2 2025-11-21 2025-11-21

Programmatic access: API GET /v1/hosts/digitalsign.pt (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/digitalsign.pt.