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.

8 hosts · 143 ms

HostCertsFirst seenLast seen
kalmarlanstrafik.se 2 2025-11-28 2025-11-28
*.kalmarlanstrafik.se 2 2025-11-28 2025-11-28
mittkonto.kalmarlanstrafik.se 3 2025-09-10 2026-07-03
stage-mittkonto.kalmarlanstrafik.se 3 2025-09-10 2026-07-03
*.bobcat.kalmarlanstrafik.se 1 2026-05-15 2026-05-15
*.prod.bobcat.kalmarlanstrafik.se 2 2025-08-14 2026-06-02
*.stage.bobcat.kalmarlanstrafik.se 1 2025-12-05 2025-12-05
*.test.bobcat.kalmarlanstrafik.se 2 2025-08-12 2026-05-28

Programmatic access: API GET /v1/hosts/kalmarlanstrafik.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/kalmarlanstrafik.se.