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.

29 hosts · 360 ms

HostCertsFirst seenLast seenDNS
uni.cards 35 2026-04-01 2026-09-30 ok
*.uni.cards 42 2026-01-12 2026-09-30 —
api-web.uni.cards 2 2026-08-11 2026-08-11 ok
test-api-web.uni.cards 2 2026-08-11 2026-08-11 ok
static.uni.cards 1 2026-09-01 2026-09-01 ok
credishield.uni.cards 3 2026-09-03 2026-09-03 ok
test-credishield.uni.cards 4 2026-09-03 2026-09-03 nxdomain
*.test-credishield.uni.cards 4 2026-09-03 2026-09-03 —
*.credishield.uni.cards 3 2026-09-03 2026-09-03 —
appsflyer-prod.uni.cards 2 2026-08-11 2026-08-11 ok
test-appsflyer-prod.uni.cards 2 2026-08-11 2026-08-11 nodata
events-prod.uni.cards 2 2026-08-11 2026-08-11 ok
test-events-prod.uni.cards 2 2026-08-11 2026-08-11 ok
api.uni.cards 2 2026-08-11 2026-08-11 ok
test-api.uni.cards 2 2026-08-11 2026-08-11 ok
link.uni.cards 2 2026-08-11 2026-08-11 ok
test-link.uni.cards 2 2026-08-11 2026-08-11 nodata
api-platform.uni.cards 2 2026-08-06 2026-08-06 ok
test-api-platform.uni.cards 2 2026-08-06 2026-08-06 nxdomain
cdn.uni.cards 3 2026-08-11 2026-09-03 ok
webcdn.uni.cards 5 2026-08-11 2026-09-21 ok
app.uni.cards 2 2026-08-11 2026-08-11 ok
test-app.uni.cards 2 2026-08-11 2026-08-11 ok
qr.uni.cards 2 2026-08-11 2026-08-11 ok
test-qr.uni.cards 2 2026-08-11 2026-08-11 ok
s.uni.cards 2 2026-08-11 2026-08-11 ok
test-s.uni.cards 2 2026-08-11 2026-08-11 ok
docs.uni.cards 5 2026-08-11 2026-09-29 ok
email-assets.uni.cards 3 2026-08-11 2026-09-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/uni.cards (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/uni.cards.