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.

25 hosts · 315 ms

HostCertsFirst seenLast seenDNS
dappleos.com 37 2026-04-20 2026-09-19 ok
*.dappleos.com 23 2026-04-20 2026-09-19 —
land.dappleos.com 2 2026-09-02 2026-09-02 ok
*.land.dappleos.com 2 2026-09-02 2026-09-02 —
landing.dappleos.com 9 2026-05-31 2026-09-26 ok
marketing.dappleos.com 7 2026-05-30 2026-09-25 ok
feedback.dappleos.com 5 2026-04-20 2026-08-30 ok
links-email.dappleos.com 1 2026-08-28 2026-08-28 ok
assets-email.dappleos.com 2 2026-08-27 2026-08-27 ok
mcp-assets-email.dappleos.com 2 2026-08-27 2026-08-27 ok
*.mcp-assets-email.dappleos.com 2 2026-08-27 2026-08-27 —
demo-studio.dappleos.com 2 2026-09-12 2026-09-12 ok
*.demo-studio.dappleos.com 2 2026-09-12 2026-09-12 —
sales.dappleos.com 13 2026-05-30 2026-09-25 ok
assets.dappleos.com 2 2026-09-01 2026-09-01 —
status.dappleos.com 6 2025-11-27 2026-08-27 ok
news.dappleos.com 2 2026-09-01 2026-09-01 ok
publish-news.dappleos.com 2 2026-09-01 2026-09-01 ok
*.publish-news.dappleos.com 2 2026-09-01 2026-09-01 —
*.news.dappleos.com 2 2026-09-01 2026-09-01 —
content.dappleos.com 2 2026-09-17 2026-09-17 ok
*.content.dappleos.com 2 2026-09-17 2026-09-17 —
support.dappleos.com 6 2026-08-04 2026-10-02 ok
academy.dappleos.com 2 2026-09-14 2026-09-14 ok
*.academy.dappleos.com 2 2026-09-14 2026-09-14 —

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