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.

14 hosts · 371 ms

HostCertsFirst seenLast seenDNS
unstop.com 2 2025-12-18 2025-12-26 ok
*.unstop.com 4 2025-08-31 2026-08-01 —
code-server-stage.unstop.com 1 2026-08-06 2026-08-06 ok
*.code-server-stage.unstop.com 2 2026-08-06 2026-08-06 —
vocavue.unstop.com 5 2026-06-05 2026-10-03 ok
lngsim.unstop.com 4 2026-04-18 2026-08-16 ok
*.code-server.unstop.com 2 2026-04-23 2026-09-23 —
campuschampions.unstop.com 3 2026-07-23 2026-09-21 ok
*.unsimulations.unstop.com 2 2026-09-17 2026-09-17 —
interviews.unstop.com 4 2026-06-01 2026-09-25 ok
ai-interviews.unstop.com 5 2026-06-03 2026-09-26 ok
sjt.unstop.com 5 2026-04-24 2026-08-22 ok
aimocktest.unstop.com 7 2026-05-26 2026-09-20 ok
adani.community.unstop.com 5 2026-05-08 2026-09-05 ok

Programmatic access, with DNS A records: API GET /v1/hosts/unstop.com (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/unstop.com.