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.

5 hosts · 272 ms

HostCertsFirst seenLast seenDNS
botmaker.com 3 2025-08-11 2026-08-19 ok
*.botmaker.com 3 2025-08-11 2026-08-19 —
static.botmaker.com 1 2026-09-16 2026-09-16 ok
lp.botmaker.com 14 2026-05-04 2026-08-31 ok
prototypes.botmaker.com 4 2026-04-20 2026-08-22 ok

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