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.

11 hosts · 281 ms

HostCertsFirst seenLast seenDNS
lnk.bio 24 2026-04-10 2026-09-21 ok
*.lnk.bio 15 2026-05-04 2026-09-14 —
gcloud.lnk.bio 1 2026-04-09 2026-04-09 ok
api.lnk.bio 3 2026-06-06 2026-08-31 ok
cdn.lnk.bio 2 2025-10-03 2026-09-17 ok
mcp.lnk.bio 4 2026-04-10 2026-09-21 ok
help.lnk.bio 2 2026-02-25 2026-07-13 ok
files.lnk.bio 8 2026-05-21 2026-09-16 ok
stats.lnk.bio 9 2026-04-10 2026-09-21 ok
mta-sts.lnk.bio 2 2025-07-14 2026-06-14 ok
www.lnk.bio 9 2026-04-10 2026-09-21 ok

Programmatic access, with DNS A records: API GET /v1/hosts/lnk.bio (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/lnk.bio.