Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

24 hosts · 202 ms

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HostCertsFirst seenLast seen
patientaccess.com 16 2025-10-12 2026-10-12
*.patientaccess.com 15 2025-10-12 2026-10-12
alpha-web2.patientaccess.com 4 2026-04-12 2026-09-17
alpha.patientaccess.com 3 2026-02-26 2026-10-10
supportpro-beta.patientaccess.com 6 2026-05-18 2026-09-11
accounts-beta.patientaccess.com 2 2026-03-06 2026-07-19
support-beta.patientaccess.com 5 2026-05-18 2026-09-10
alpha-web.patientaccess.com 2 2026-05-11 2026-09-23
preprod.patientaccess.com 4 2026-06-12 2026-10-10
accounts-preprod.patientaccess.com 2 2026-06-02 2026-10-13
links.staging.patientaccess.com 2 2026-02-28 2026-07-10
api.patientaccess.com 2 2026-02-28 2026-07-10
preprod-api.patientaccess.com 2 2026-03-01 2026-07-11
beta-iam.patientaccess.com 3 2026-02-20 2026-10-04
pro.patientaccess.com 2 2026-03-25 2026-08-04
supportpro.patientaccess.com 4 2026-05-18 2026-09-11
app.patientaccess.com 5 2026-05-21 2026-09-17
links.patientaccess.com 2 2026-02-28 2026-07-10
widgets.patientaccess.com 4 2026-06-05 2026-10-03
alpha-widgets.patientaccess.com 5 2026-05-09 2026-09-06
preprod-widgets.patientaccess.com 5 2026-06-04 2026-10-02
account.patientaccess.com 2 2026-03-01 2026-07-12
support.patientaccess.com 6 2026-05-18 2026-09-11
www.patientaccess.com 5 2026-04-13 2026-08-25

Programmatic access: API GET /v1/hosts/patientaccess.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/patientaccess.com.