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.

21 hosts · 237 ms

HostCertsFirst seenLast seen
bluebricks.co 47 2026-04-25 2026-09-04
*.bluebricks.co 22 2026-02-07 2026-09-04
schema.bluebricks.co 29 2026-06-02 2026-09-28
oidc.bluebricks.co 10 2026-06-03 2026-09-30
poc.bluebricks.co 4 2026-05-09 2026-07-10
page.bluebricks.co 12 2026-06-07 2026-10-03
auth.bluebricks.co 10 2026-04-25 2026-08-22
api.bluebricks.co 16 2025-07-29 2026-09-09
support-portal.bluebricks.co 1 2025-10-09 2025-10-09
demo.bluebricks.co 3 2026-06-11 2026-08-11
help.bluebricks.co 23 2025-10-28 2026-09-28
app.bluebricks.co 13 2025-11-18 2026-08-28
docs.bluebricks.co 10 2026-04-21 2026-08-17
pages.bluebricks.co 10 2026-05-27 2026-09-22
cms.bluebricks.co 2 2026-05-03 2026-05-03
assets.bluebricks.co 29 2026-04-13 2026-10-07
status.bluebricks.co 21 2026-04-19 2026-08-24
support.bluebricks.co 20 2025-10-09 2026-09-09
trust.bluebricks.co 18 2026-05-29 2026-09-24
www.bluebricks.co 27 2026-05-06 2026-09-01
registry.bluebricks.co 3 2026-04-25 2026-06-19

Programmatic access: API GET /v1/hosts/bluebricks.co (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/bluebricks.co.