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.

20 hosts · 567 ms

HostCertsFirst seenLast seenDNS
pihhealth.org 16 2025-12-27 2026-09-23 ok
*.pihhealth.org 4 2025-12-27 2026-08-25 —
expresswaye1.pihhealth.org 1 2026-02-26 2026-02-26 ok
expresswaye2.pihhealth.org 1 2026-02-26 2026-02-26 ok
expresswaye3.pihhealth.org 6 2025-08-01 2026-08-24 ok
www.expresswaye3.pihhealth.org 6 2025-08-01 2026-08-24 nxdomain
healthhub.pihhealth.org 2 2026-09-14 2026-09-17 nodata
collab-edge.pihhealth.org 1 2026-02-26 2026-02-26 nodata
expresswaye.pihhealth.org 1 2026-02-26 2026-02-26 ok
www.expresswaye.pihhealth.org 1 2026-02-26 2026-02-26 nxdomain
webmail.pihhealth.org 1 2025-10-11 2025-10-11 ok
www.webmail.pihhealth.org 1 2025-10-11 2025-10-11 nxdomain
smtp.pihhealth.org 1 2025-10-11 2025-10-11 nodata
autodiscover.pihhealth.org 1 2025-10-11 2025-10-11 ok
jobs.pihhealth.org 5 2025-10-09 2026-08-24 ok
www.jobs.pihhealth.org 5 2025-10-09 2026-08-24 nxdomain
analytics.pihhealth.org 5 2026-05-04 2026-09-23 ok
careers.pihhealth.org 1 2026-03-01 2026-03-01 ok
www.careers.pihhealth.org 1 2026-03-01 2026-03-01 nxdomain
www.pihhealth.org 5 2026-05-04 2026-09-23 ok

Programmatic access, with DNS A records: API GET /v1/hosts/pihhealth.org (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/pihhealth.org.