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.

18 hosts · 276 ms

HostCertsFirst seenLast seen
liveblocks.io 18 2026-04-28 2026-09-02
*.liveblocks.io 5 2026-04-30 2026-09-02
auth2.liveblocks.io 10 2026-05-12 2026-09-07
url1973.liveblocks.io 8 2026-04-20 2026-08-16
api.liveblocks.io 8 2026-05-19 2026-07-20
setup.saml.liveblocks.io 8 2026-05-26 2026-09-21
prod.m2m.liveblocks.io 2 2025-07-28 2026-06-28
eu-central-1.prod.m2m.liveblocks.io 2 2026-03-30 2026-08-30
us-east-1.prod.m2m.liveblocks.io 2 2026-03-31 2026-08-31
eu-central-1.dev.m2m.liveblocks.io 2 2026-03-25 2026-08-25
us-east-1.dev.m2m.liveblocks.io 2 2026-03-31 2026-08-31
us-east-1.vercel-log-drain.liveblocks.io 1 2025-12-10 2025-12-10
eu-east-1.vercel-log-drain.liveblocks.io 1 2025-12-09 2025-12-09
us-east-1.dev.vercel-log-drain.liveblocks.io 1 2025-12-09 2025-12-09
us-east-1.otel-collector.liveblocks.io 1 2025-12-04 2025-12-04
us-east-1.dev.otel-collector.liveblocks.io 1 2025-12-04 2025-12-04
emails.liveblocks.io 13 2026-05-15 2026-09-12
live-dev.liveblocks.io 4 2026-08-23 2026-09-18

Programmatic access: API GET /v1/hosts/liveblocks.io (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/liveblocks.io.