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.

9 hosts · 245 ms

HostCertsFirst seenLast seen
oteuamigo.pt 1 2026-02-10 2026-02-10
infoue.oteuamigo.pt 2 2025-08-18 2026-07-23
digitalsign.oteuamigo.pt 21 2026-03-26 2026-10-04
login.oteuamigo.pt 1 2026-02-10 2026-02-10
identity-session.oteuamigo.pt 9 2026-05-08 2026-10-09
app.oteuamigo.pt 1 2026-05-22 2026-05-22
chat.oteuamigo.pt 1 2026-05-08 2026-05-08
www.oteuamigo.pt 1 2026-02-10 2026-02-10
pay.oteuamigo.pt 3 2026-02-26 2026-08-14

Programmatic access: API GET /v1/hosts/oteuamigo.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/oteuamigo.pt.