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.

27 hosts · 330 ms

HostCertsFirst seenLast seen
zed.dev 92 2026-04-26 2026-09-23
*.zed.dev 20 2026-05-27 2026-09-23
delta.zed.dev 2 2026-08-27 2026-08-27
*.delta.zed.dev 2 2026-08-27 2026-08-27
sec.zed.dev 3 2026-06-12 2026-08-12
dashboard.zed.dev 8 2026-04-25 2026-08-22
cloud.zed.dev 8 2026-04-29 2026-08-25
delta-prototype.zed.dev 16 2026-05-11 2026-09-09
*.delta-prototype.zed.dev 6 2026-05-25 2026-09-09
beta-site.zed.dev 4 2026-04-28 2026-06-26
*.beta-site.zed.dev 4 2026-04-28 2026-06-26
staging.zed.dev 4 2026-05-06 2026-07-08
delta-prototype-staging.zed.dev 6 2026-06-23 2026-08-21
*.delta-prototype-staging.zed.dev 6 2026-06-23 2026-08-21
merch.zed.dev 7 2026-04-16 2026-08-25
delta-trunk.zed.dev 4 2026-08-20 2026-08-20
*.delta-trunk.zed.dev 4 2026-08-20 2026-08-20
admin-panel.zed.dev 6 2026-05-07 2026-09-02
cdn.zed.dev 8 2026-04-26 2026-08-22
docs.zed.dev 7 2026-04-20 2026-08-17
*.docs.zed.dev 4 2026-08-17 2026-08-17
images.zed.dev 9 2026-06-01 2026-09-27
codeowners.zed.dev 5 2026-05-06 2026-09-04
status.zed.dev 5 2026-05-30 2026-09-29
github-bot.zed.dev 12 2026-04-26 2026-08-22
danger-proxy.zed.dev 8 2026-05-11 2026-09-22
*.danger-proxy.zed.dev 2 2026-09-22 2026-09-22

Programmatic access: API GET /v1/hosts/zed.dev (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/zed.dev.