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.

100 hosts (first page) · 514 ms

HostCertsFirst seenLast seenDNS
functionhealth.com 28 2026-04-21 2026-09-21 ok
*.functionhealth.com 21 2026-04-21 2026-09-21 —
url5613.functionhealth.com 6 2026-04-15 2026-09-28 ok
media.functionhealth.com 4 2026-04-14 2026-09-24 ok
static.functionhealth.com 3 2026-04-26 2026-08-14 ok
devhub.svc.functionhealth.com 3 2026-05-27 2026-09-12 ok
particle-document-upload.svc.functionhealth.com 4 2026-06-18 2026-10-04 ok
sendgrid.svc.functionhealth.com 2 2026-05-19 2026-07-12 ok
admin-app-backend.svc.functionhealth.com 5 2026-04-22 2026-09-30 ok
fake-service.svc.functionhealth.com 3 2026-05-02 2026-08-19 ok
enterprise-service.svc.functionhealth.com 4 2026-05-06 2026-08-22 ok
data-sharing-service.svc.functionhealth.com 4 2026-04-15 2026-09-25 ok
referral-service.svc.functionhealth.com 5 2026-04-09 2026-09-20 ok
counsel-service.svc.functionhealth.com 3 2026-04-30 2026-08-17 ok
reconciliation-service.svc.functionhealth.com 3 2026-05-06 2026-08-23 ok
mcp-service.svc.functionhealth.com 2 2026-09-30 2026-09-30 ok
membership-service.svc.functionhealth.com 5 2026-04-22 2026-10-04 ok
ppp-service.svc.functionhealth.com 2 2026-06-30 2026-08-23 ok
fhir-service.svc.functionhealth.com 4 2026-05-06 2026-08-21 ok
receipts-service.svc.functionhealth.com 3 2026-04-30 2026-08-16 ok
layout-service.svc.functionhealth.com 5 2026-04-14 2026-09-25 ok
phlebotomy-service.svc.functionhealth.com 3 2026-10-01 2026-10-01 ok
eligibility-service.svc.functionhealth.com 1 2026-09-11 2026-09-11 ok
authservice.svc.functionhealth.com 3 2026-05-20 2026-09-08 ok
accesscode.svc.functionhealth.com 3 2026-05-07 2026-08-21 ok
member-app-core.svc.functionhealth.com 3 2026-05-01 2026-08-17 ok
fleet-migrate.svc.functionhealth.com 2 2026-09-14 2026-09-14 ok
gifting.svc.functionhealth.com 4 2026-04-27 2026-10-04 ok
emr-api.svc.functionhealth.com 3 2026-06-17 2026-09-30 ok
member-context-api.svc.functionhealth.com 1 2026-10-01 2026-10-01 ok
questapi.svc.functionhealth.com 4 2026-06-02 2026-09-17 ok
particle-webhook.svc.functionhealth.com 2 2026-06-17 2026-08-13 ok
particle-data-retrieval.svc.functionhealth.com 2 2026-06-18 2026-08-14 ok
membercom.svc.functionhealth.com 3 2026-05-19 2026-09-01 ok
member-data-platform.svc.functionhealth.com 4 2026-06-18 2026-10-02 ok
particle-document-generation.svc.functionhealth.com 2 2026-07-10 2026-09-03 ok
transaction.svc.functionhealth.com 5 2026-04-16 2026-09-24 ok
twilio.svc.functionhealth.com 3 2026-05-05 2026-08-17 ok
uap.svc.functionhealth.com 3 2026-05-24 2026-09-10 ok
partner-purchase-worker.svc.functionhealth.com 1 2026-09-09 2026-09-09 ok
particle-reconciler.svc.functionhealth.com 3 2026-06-18 2026-10-02 ok
sonora-api-wrapper.svc.functionhealth.com 3 2026-05-28 2026-09-14 ok
scheduling-services.svc.functionhealth.com 3 2026-05-01 2026-08-15 ok
clinician-notes.svc.functionhealth.com 3 2026-05-21 2026-09-04 ok
atlantis.svc.functionhealth.com 1 2026-08-14 2026-08-14 ok
missing-biomarkers.svc.functionhealth.com 3 2026-04-28 2026-08-20 ok
workers.svc.functionhealth.com 3 2026-05-18 2026-09-04 ok
ai-chat.svc.functionhealth.com 3 2026-05-20 2026-09-07 ok
single-agent-chat.svc.functionhealth.com 3 2026-05-19 2026-09-06 ok
particle-patient-submit.svc.functionhealth.com 5 2026-06-18 2026-10-01 ok
particle-query-submit.svc.functionhealth.com 5 2026-06-18 2026-10-02 ok
particle-daily-report.svc.functionhealth.com 2 2026-06-18 2026-08-11 ok
particle-ingest.svc.functionhealth.com 4 2026-06-18 2026-10-01 ok
member-ingest.svc.functionhealth.com 3 2026-04-30 2026-08-19 ok
emr-gateway.svc.functionhealth.com 4 2026-06-17 2026-10-03 ok
journey.svc.functionhealth.com 3 2026-04-24 2026-08-12 ok
ai-summary.svc.functionhealth.com 3 2026-05-21 2026-09-07 ok
mid.functionhealth.com 1 2026-05-11 2026-05-11 ok
brand.functionhealth.com 7 2026-04-12 2026-09-22 ok
memberappbackend.functionhealth.com 1 2026-05-08 2026-05-08 ok
k8s.svc.prod.functionhealth.com 3 2026-08-07 2026-10-05 nodata
*.k8s.svc.prod.functionhealth.com 4 2026-08-07 2026-10-05 —
statsig.functionhealth.com 2 2026-05-13 2026-07-08 ok
email.mg.functionhealth.com 5 2026-05-28 2026-09-25 ok
staging.functionhealth.com 17 2026-05-05 2026-09-15 nodata
*.staging.functionhealth.com 20 2026-05-05 2026-09-15 —
partners.staging.functionhealth.com 20 2026-05-11 2026-09-21 nodata
*.partners.staging.functionhealth.com 23 2026-05-05 2026-09-21 —
auth.functionhealth.com 8 2026-06-05 2026-10-03 ok
counsel.functionhealth.com 11 2026-05-16 2026-10-03 ok
cdn.functionhealth.com 2 2026-05-31 2026-07-26 ok
mri-education.functionhealth.com 2 2026-07-02 2026-08-24 ok
whoop.functionhealth.com 2 2025-09-02 2026-08-03 ok
refer.functionhealth.com 3 2026-05-10 2026-08-26 ok
fhir.functionhealth.com 1 2026-04-26 2026-04-26 ok
metrics.functionhealth.com 4 2026-05-01 2026-10-01 ok
services.functionhealth.com 24 2026-04-29 2026-09-17 ok
*.services.functionhealth.com 20 2026-05-12 2026-09-17 —
argocd.services.functionhealth.com 1 2026-04-24 2026-04-24 ok
staging.services.functionhealth.com 16 2026-05-12 2026-09-07 nodata
*.staging.services.functionhealth.com 16 2026-05-12 2026-09-07 —
argocd.staging.services.functionhealth.com 1 2026-04-13 2026-04-13 ok
otel.staging.services.functionhealth.com 1 2026-04-13 2026-04-13 ok
otel.services.functionhealth.com 2 2026-04-24 2026-08-18 ok
development.services.functionhealth.com 14 2026-04-24 2026-08-30 ok
*.development.services.functionhealth.com 17 2026-04-24 2026-08-30 —
otel.development.services.functionhealth.com 3 2026-07-02 2026-08-31 ok
enterprise-sales.functionhealth.com 5 2026-04-27 2026-08-25 ok
referrals.functionhealth.com 5 2026-05-01 2026-08-29 ok
organizations.functionhealth.com 14 2026-04-21 2026-08-18 ok
partners.functionhealth.com 19 2026-05-11 2026-09-24 nodata
*.partners.functionhealth.com 22 2026-05-11 2026-09-24 —
creators.functionhealth.com 2 2026-03-17 2026-08-17 ok
api-creators.functionhealth.com 2 2026-03-17 2026-08-17 ok
support.functionhealth.com 10 2026-04-15 2026-08-11 ok
dev.functionhealth.com 14 2026-04-24 2026-09-24 nodata
*.dev.functionhealth.com 20 2026-04-24 2026-09-24 —
my10.dev.functionhealth.com 3 2026-06-16 2026-10-05 ok
my11.dev.functionhealth.com 3 2026-05-31 2026-09-16 ok
my1.dev.functionhealth.com 3 2026-05-27 2026-09-13 ok

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/functionhealth.com.

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/functionhealth.com.