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.

9 hosts · 281 ms

HostCertsFirst seenLast seenDNS
drivescore.com 19 2026-05-16 2026-10-01 ok
*.drivescore.com 19 2026-05-16 2026-10-01 —
ctd.drivescore.com 5 2026-04-28 2026-09-27 ok
link.drivescore.com 4 2026-05-17 2026-08-01 ok
links.email.drivescore.com 5 2026-04-14 2026-06-12 ok
m.drivescore.com 9 2026-05-17 2026-09-30 nodata
*.m.drivescore.com 9 2026-05-17 2026-09-30 —
open.drivescore.com 3 2026-06-17 2026-09-01 ok
help.drivescore.com 5 2026-05-27 2026-09-24 ok

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