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.

34 hosts · 418 ms

HostCertsFirst seenLast seenDNS
ideoon.ch 5 2025-08-18 2026-09-28 ok
*.ideoon.ch 3 2025-09-26 2026-09-28 —
gitlab.ideoon.ch 2 2025-08-21 2026-07-22 ok
oidc.ideoon.ch 2 2026-08-24 2026-08-24 ok
soccer-backend.ideoon.ch 1 2026-05-19 2026-05-19 nxdomain
mobile.ideoon.ch 1 2026-06-15 2026-06-15 ok
ai.ideoon.ch 3 2026-03-27 2026-08-27 ok
api.ideoon.ch 1 2026-06-15 2026-06-15 ok
webhook.ideoon.ch 2 2026-03-27 2026-08-27 ok
soccer.ideoon.ch 1 2026-05-19 2026-05-19 ok
external-sb.e-newsletter.ideoon.ch 1 2025-12-29 2025-12-29 ok
internal.e-newsletter.ideoon.ch 1 2025-12-29 2025-12-29 ok
external.e-newsletter.ideoon.ch 1 2025-12-29 2025-12-29 ok
external-sb.dev.e-newsletter.ideoon.ch 1 2025-12-29 2025-12-29 ok
internal.dev.e-newsletter.ideoon.ch 1 2025-12-29 2025-12-29 ok
external.dev.e-newsletter.ideoon.ch 1 2025-12-29 2025-12-29 ok
kas.ideoon.ch 2 2025-08-21 2026-07-22 ok
gitlab.sharedservices.ideoon.ch 3 2025-08-21 2026-07-22 ok
kas.sharedservices.ideoon.ch 2 2025-08-21 2026-07-22 ok
registry.sharedservices.ideoon.ch 2 2025-08-21 2026-07-22 ok
images.ideoon.ch 3 2025-11-19 2026-08-16 ok
jenkins.ideoon.ch 1 2026-02-05 2026-02-05 ok
dot.ideoon.ch 5 2026-05-08 2026-09-05 ok
export.ideoon.ch 3 2025-09-19 2026-08-20 ok
dev.ideoon.ch 2 2026-05-08 2026-09-09 ok
mobile.dev.ideoon.ch 2 2026-05-08 2026-05-13 ok
auth.dev.ideoon.ch 1 2026-06-18 2026-06-18 ok
ai.dev.ideoon.ch 1 2026-03-26 2026-03-26 nxdomain
api.dev.ideoon.ch 4 2026-05-04 2026-10-04 ok
webhook.dev.ideoon.ch 1 2026-03-26 2026-03-26 nxdomain
images.dev.ideoon.ch 3 2025-11-16 2026-09-09 ok
export.dev.ideoon.ch 3 2025-11-16 2026-09-09 ok
www.ideoon.ch 2 2025-08-18 2026-07-19 ok
registry.ideoon.ch 2 2025-08-21 2026-07-22 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ideoon.ch (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/ideoon.ch.