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 · 312 ms

HostCertsFirst seenLast seenDNS
spartanchemical.com 1 2025-10-10 2025-10-10 ok
*.spartanchemical.com 1 2025-10-10 2025-10-10 —
governance.spartanchemical.com 3 2026-07-30 2026-09-28 ok
productpro-stg.spartanchemical.com 1 2026-01-01 2026-01-01 ok
www.productpro-stg.spartanchemical.com 1 2026-01-01 2026-01-01 nxdomain
vpn.spartanchemical.com 1 2025-10-10 2025-10-10 ok
productpro.spartanchemical.com 1 2026-02-12 2026-02-12 ok
www.productpro.spartanchemical.com 1 2026-02-12 2026-02-12 nxdomain
help.spartanchemical.com 2 2026-08-24 2026-08-24 ok
submissions.spartanchemical.com 4 2026-04-14 2026-08-12 ok
nps.spartanchemical.com 1 2025-10-10 2025-10-10 ok
productpro-dev.spartanchemical.com 1 2025-12-08 2025-12-08 ok
www.productpro-dev.spartanchemical.com 1 2025-12-08 2025-12-08 nxdomain
www.spartanchemical.com 1 2025-10-10 2025-10-10 ok

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