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.

18 hosts · 454 ms

HostCertsFirst seenLast seenDNS
skagen.com 7 2026-05-30 2026-09-25 ok
*.skagen.com 7 2026-05-30 2026-09-25 —
prod.skagen.com 21 2026-05-15 2026-09-25 ok
*.prod.skagen.com 8 2026-05-30 2026-09-25 —
cloud.e.skagen.com 2 2025-08-15 2026-08-02 ok
image.e.skagen.com 4 2025-09-17 2026-10-05 ok
click.e.skagen.com 2 2025-08-15 2026-08-02 ok
view.e.skagen.com 2 2025-08-15 2026-08-03 ok
staging.skagen.com 20 2026-05-20 2026-09-15 ok
yogi-staging.skagen.com 10 2026-06-01 2026-09-27 ok
mi.skagen.com 3 2025-11-02 2026-10-03 ok
gtm.skagen.com 3 2026-05-14 2026-08-31 ok
stores.skagen.com 2 2026-09-02 2026-09-02 ok
dev.skagen.com 23 2026-05-01 2026-09-22 ok
yogi-dev.skagen.com 20 2026-04-24 2026-09-14 ok
*.yogi-dev.skagen.com 10 2026-04-24 2026-08-20 —
*.dev.skagen.com 10 2026-05-27 2026-09-22 —
www.skagen.com 10 2026-05-15 2026-09-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/skagen.com (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/skagen.com.