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.

26 hosts · 266 ms

HostCertsFirst seenLast seenDNS
peopleshealth.com 24 2025-09-05 2026-10-05 ok
providerblog.peopleshealth.com 8 2026-01-28 2026-09-09 ok
green.providerblog.peopleshealth.com 7 2026-01-27 2026-08-27 ok
www.green.providerblog.peopleshealth.com 4 2026-01-28 2026-08-27 nxdomain
preview.providerblog.peopleshealth.com 7 2026-01-27 2026-08-27 ok
www.preview.providerblog.peopleshealth.com 4 2026-01-28 2026-08-27 nxdomain
www.providerblog.peopleshealth.com 11 2026-01-27 2026-09-09 ok
green.peopleshealth.com 23 2025-09-03 2026-08-31 ok
www.green.peopleshealth.com 18 2025-09-05 2026-08-31 ok
autodiscover.peopleshealth.com 2 2026-03-24 2026-07-30 ok
champions.peopleshealth.com 8 2026-01-28 2026-09-09 ok
green.champions.peopleshealth.com 7 2026-01-27 2026-08-27 ok
www.green.champions.peopleshealth.com 4 2026-01-28 2026-08-27 nxdomain
preview.champions.peopleshealth.com 7 2026-01-27 2026-08-27 ok
www.preview.champions.peopleshealth.com 4 2026-01-28 2026-08-27 nxdomain
www.champions.peopleshealth.com 11 2026-01-27 2026-09-09 ok
producers.peopleshealth.com 8 2026-01-28 2026-09-09 ok
green.producers.peopleshealth.com 7 2026-01-27 2026-08-27 ok
www.green.producers.peopleshealth.com 4 2026-01-28 2026-08-27 nxdomain
preview.producers.peopleshealth.com 7 2026-01-27 2026-08-27 ok
www.preview.producers.peopleshealth.com 4 2026-01-28 2026-08-27 nxdomain
www.producers.peopleshealth.com 11 2026-01-27 2026-09-09 ok
get.peopleshealth.com 16 2026-05-15 2026-09-10 ok
preview.peopleshealth.com 23 2025-09-03 2026-08-31 ok
www.preview.peopleshealth.com 18 2025-09-05 2026-08-31 ok
www.peopleshealth.com 27 2025-09-03 2026-09-09 ok

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