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.

6 hosts · 200 ms

HostCertsFirst seenLast seen
vivus.se 6 2026-05-06 2026-09-01
*.vivus.se 1 2026-02-02 2026-02-02
cola.vivus.se 5 2026-04-25 2026-08-23
go.vivus.se 5 2026-05-09 2026-09-09
client.vivus.se 5 2026-04-27 2026-08-24
www.vivus.se 8 2026-05-03 2026-08-29

Programmatic access: API GET /v1/hosts/vivus.se (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/vivus.se.