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.

12 hosts · 221 ms

HostCertsFirst seenLast seenDNS
ikea.jp 13 2026-05-20 2026-09-28 ok
*.ikea.jp 1 2026-09-28 2026-09-28 —
cloud.news.email.ikea.jp 3 2025-07-25 2026-07-12 ok
data.e.news.email.ikea.jp 2 2026-07-13 2026-07-13 ok
cdn.e.news.email.ikea.jp 13 2026-07-09 2026-07-16 ok
image.news.email.ikea.jp 4 2025-08-12 2026-08-28 ok
click.news.email.ikea.jp 2 2025-07-25 2026-07-12 ok
view.news.email.ikea.jp 2 2025-08-08 2026-07-30 ok
secure.installation.ikea.jp 1 2026-05-18 2026-05-18 ok
www.secure.installation.ikea.jp 1 2026-05-18 2026-05-18 nxdomain
go.ikea.jp 4 2026-06-04 2026-08-02 ok
www.ikea.jp 10 2026-04-13 2026-08-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ikea.jp (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/ikea.jp.