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.

15 hosts · 260 ms

HostCertsFirst seenLast seenDNS
columbiaprivatetrust.com 20 2025-07-24 2026-08-31 ok
api-prod.columbiaprivatetrust.com 4 2025-08-06 2026-07-23 nxdomain
kong.columbiaprivatetrust.com 6 2025-08-06 2026-07-23 nxdomain
api.columbiaprivatetrust.com 3 2025-09-08 2026-07-23 nxdomain
portal.columbiaprivatetrust.com 16 2025-08-04 2026-10-01 ok
api-atl.columbiaprivatetrust.com 4 2025-08-06 2026-07-23 nxdomain
api-las.columbiaprivatetrust.com 4 2025-08-06 2026-07-23 nxdomain
test.columbiaprivatetrust.com 1 2026-06-08 2026-06-08 nxdomain
kong-test.columbiaprivatetrust.com 2 2025-08-06 2026-07-23 nxdomain
api-test.columbiaprivatetrust.com 3 2025-08-06 2026-07-23 nxdomain
portal-test.columbiaprivatetrust.com 15 2025-08-04 2026-10-01 ok
www-test.columbiaprivatetrust.com 3 2025-08-04 2026-07-23 nxdomain
api-dev.columbiaprivatetrust.com 3 2025-08-06 2026-07-23 nxdomain
portal-dev.columbiaprivatetrust.com 3 2025-08-06 2026-07-23 nxdomain
www.columbiaprivatetrust.com 24 2025-08-04 2026-08-22 ok

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