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.

13 hosts · 275 ms

HostCertsFirst seenLast seen
sky.ie 4 2026-03-23 2026-09-18
preprod.sky.ie 1 2025-12-05 2025-12-05
www.preprod.sky.ie 1 2025-12-05 2025-12-05
stage.sky.ie 1 2025-12-05 2025-12-05
www.stage.sky.ie 1 2025-12-05 2025-12-05
*.stage-cf.sky.ie 10 2025-09-26 2026-08-28
*.test-cf.sky.ie 12 2025-09-09 2026-09-07
*.dev-cf.sky.ie 3 2025-09-19 2026-08-13
*.cf.sky.ie 4 2025-10-03 2026-09-07
mail.sky.ie 1 2025-12-15 2025-12-15
test.sky.ie 1 2025-12-05 2025-12-05
www.test.sky.ie 1 2025-12-05 2025-12-05
www.sky.ie 3 2026-03-23 2026-09-15

Programmatic access: API GET /v1/hosts/sky.ie (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/sky.ie.