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.

19 hosts · 257 ms

HostCertsFirst seenLast seenDNS
coolblue.de 2 2025-09-18 2026-08-18 ok
image.coolblue.de 1 2026-01-09 2026-01-09 ok
jje.coolblue.de 2 2026-08-31 2026-09-01 ok
*.jje.coolblue.de 2 2026-08-31 2026-09-01 —
blog.coolblue.de 2 2026-02-22 2026-07-10 ok
www.blog.coolblue.de 2 2026-02-22 2026-07-10 nxdomain
cashback.coolblue.de 2 2025-09-22 2026-08-23 ok
www.cashback.coolblue.de 2 2025-09-22 2026-08-23 nxdomain
internal.coolblue.de 2 2026-08-10 2026-08-10 ok
nachrichten.coolblue.de 2 2026-04-30 2026-09-30 ok
www.nachrichten.coolblue.de 2 2026-04-30 2026-09-30 nxdomain
app.coolblue.de 2 2026-04-08 2026-09-08 ok
mimir.coolblue.de 2 2025-08-18 2026-07-19 ok
manuals.coolblue.de 1 2025-12-09 2025-12-09 ok
product-energy-label-specifications.coolblue.de 2 2026-03-31 2026-08-31 ok
sitemaps.coolblue.de 1 2025-12-25 2025-12-25 ok
assets.coolblue.de 1 2025-12-30 2025-12-30 ok
accounts.coolblue.de 2 2025-07-28 2026-06-28 ok
www.coolblue.de 1 2026-01-12 2026-01-12 ok

Programmatic access, with DNS A records: API GET /v1/hosts/coolblue.de (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/coolblue.de.