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.

15 hosts · 283 ms

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HostCertsFirst seenLast seen
hooks.se 8 2026-05-15 2026-09-12
capig.hooks.se 10 2026-05-25 2026-09-20
api.hooks.se 4 2025-09-22 2026-09-09
www.api.hooks.se 4 2025-09-22 2026-09-09
mta-sts.hooks.se 1 2025-11-30 2025-11-30
hookslanet.hooks.se 5 2026-05-01 2026-09-02
www.hookslanet.hooks.se 5 2026-05-01 2026-09-02
int.hooks.se 3 2025-10-01 2026-09-09
*.int.hooks.se 1 2025-12-08 2025-12-08
www.int.hooks.se 2 2025-10-01 2026-09-09
api-tst.hooks.se 4 2025-09-22 2026-09-09
www.api-tst.hooks.se 4 2025-09-22 2026-09-09
api-dev.hooks.se 4 2025-09-22 2026-09-09
www.api-dev.hooks.se 4 2025-09-22 2026-09-09
www.hooks.se 8 2026-05-15 2026-09-12

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