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 · 230 ms

HostCertsFirst seenLast seenDNS
gjensidige.se 2 2025-08-18 2026-08-31 ok
beta.gjensidige.se 1 2025-10-02 2025-10-02 ok
sid.gjensidige.se 5 2026-04-22 2026-08-20 ok
info.gjensidige.se 1 2026-01-28 2026-01-28 ok
www.info.gjensidige.se 1 2026-01-28 2026-01-28 ok
www.gjensidige.se 2 2025-08-18 2026-08-31 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gjensidige.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/gjensidige.se.