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) · 422 ms

HostCertsFirst seenLast seenDNS
domyn.com 13 2026-04-29 2026-09-29 ok
*.domyn.com 2 2026-04-29 2026-09-29 —
oauth.widiba.domyn.com 4 2026-07-03 2026-09-24 nxdomain
fsi-sand.domyn.com 1 2026-09-24 2026-09-24 nxdomain
*.fsi-sand.domyn.com 1 2026-09-24 2026-09-24 —
staging.domyn.com 9 2026-04-21 2026-09-15 ok
alterra-staging.domyn.com 2 2026-09-09 2026-09-09 ok
api.alterra-staging.domyn.com 2 2026-09-09 2026-09-09 ok
lepton-staging.domyn.com 10 2026-08-21 2026-09-24 ok
*.lepton-staging.domyn.com 1 2026-09-24 2026-09-24 —
api.lepton-staging.domyn.com 9 2026-08-21 2026-08-27 ok
*.staging.domyn.com 2 2026-09-14 2026-09-15 —
grpc.staging.domyn.com 3 2026-09-14 2026-09-28 ok
*.grpc.staging.domyn.com 2 2026-09-14 2026-09-28 —
api.grpc.staging.domyn.com 3 2026-09-14 2026-09-28 ok
test-svc.staging.domyn.com 1 2026-09-15 2026-09-15 ok
api.staging.domyn.com 7 2026-04-21 2026-09-04 ok
domynshift.staging.domyn.com 1 2026-09-15 2026-09-15 ok
oauth.fincantieri.domyn.com 4 2026-07-03 2026-09-24 nxdomain
internal.domyn.com 5 2026-04-21 2026-09-21 ok
*.internal.domyn.com 1 2026-09-21 2026-09-21 —
api.internal.domyn.com 4 2026-04-21 2026-09-18 ok
devops-mcp1.mcp.internal.domyn.com 15 2026-04-20 2026-06-29 ok
sociosage.mcp.internal.domyn.com 2 2026-08-04 2026-10-03 ok
fincantieri-erm.mcp.internal.domyn.com 8 2026-04-20 2026-08-28 ok
demo-watchmen.mcp.internal.domyn.com 5 2026-05-20 2026-09-17 ok
bper-watchmen.mcp.internal.domyn.com 5 2026-05-05 2026-09-02 ok
fsi-neurosym-dq.mcp.internal.domyn.com 2 2026-08-04 2026-10-03 ok
demo-prototypes.mcp.internal.domyn.com 1 2026-08-28 2026-08-28 ok
*.demo-prototypes.mcp.internal.domyn.com 1 2026-09-28 2026-09-28 —
app1.demo-prototypes.mcp.internal.domyn.com 2 2026-08-28 2026-08-28 nxdomain
app2.demo-prototypes.mcp.internal.domyn.com 1 2026-09-21 2026-09-21 nxdomain
app3.demo-prototypes.mcp.internal.domyn.com 1 2026-09-21 2026-09-21 nxdomain
app4.demo-prototypes.mcp.internal.domyn.com 1 2026-09-29 2026-09-29 ok
app5.demo-prototypes.mcp.internal.domyn.com 1 2026-09-30 2026-09-30 ok
app6.demo-prototypes.mcp.internal.domyn.com 2 2026-10-02 2026-10-02 ok
bper-suggestions.mcp.internal.domyn.com 5 2026-05-05 2026-09-02 ok
demo-preprod-uda.app.internal.domyn.com 1 2026-08-07 2026-08-07 ok
staging-uda.app.internal.domyn.com 2 2026-08-06 2026-10-05 ok
demo-uda.app.internal.domyn.com 3 2026-06-09 2026-08-08 ok
demo-finsage.app.internal.domyn.com 3 2026-06-08 2026-08-07 ok
demo-teki.app.internal.domyn.com 5 2026-05-28 2026-09-25 ok
login.ephemeral-test.ephemeral.domyn.com 4 2026-04-30 2026-05-04 nxdomain
domynswarm.domyn.com 1 2026-08-25 2026-08-25 ok
polaron.domyn.com 2 2026-09-23 2026-09-23 ok
*.polaron.domyn.com 1 2026-09-23 2026-09-23 —
uptrace.polaron.domyn.com 2 2026-10-01 2026-10-01 ok
oauth.polaron.domyn.com 1 2026-09-23 2026-09-23 ok
api.polaron.domyn.com 1 2026-09-23 2026-09-23 nxdomain
*.ephemeral.polaron.domyn.com 2 2026-10-01 2026-10-01 —
boson.domyn.com 7 2026-06-29 2026-09-24 ok
*.boson.domyn.com 1 2026-09-24 2026-09-24 —
uptrace.boson.domyn.com 3 2026-07-10 2026-09-08 ok
oauth.boson.domyn.com 3 2026-07-03 2026-09-01 ok
api.boson.domyn.com 6 2026-06-29 2026-08-28 ok
photon.domyn.com 3 2026-06-09 2026-08-08 ok
oauth.photon.domyn.com 3 2026-07-03 2026-09-01 ok
api.photon.domyn.com 3 2026-06-09 2026-08-08 ok
lepton.domyn.com 11 2026-08-18 2026-09-24 ok
*.lepton.domyn.com 1 2026-09-24 2026-09-24 —
uptrace.lepton.domyn.com 2 2026-08-18 2026-09-24 ok
oauth.lepton.domyn.com 2 2026-08-18 2026-09-24 ok
api.lepton.domyn.com 10 2026-08-18 2026-08-26 ok
tachyon.domyn.com 5 2026-04-17 2026-09-24 ok
*.tachyon.domyn.com 1 2026-09-24 2026-09-24 —
oauth.tachyon.domyn.com 4 2026-07-03 2026-09-24 ok
api.tachyon.domyn.com 4 2026-04-17 2026-08-15 ok
demo.domyn.com 7 2026-04-20 2026-09-21 ok
*.demo.domyn.com 1 2026-09-21 2026-09-21 —
fec-data.demo.domyn.com 3 2026-07-11 2026-09-09 ok
fec-guard.demo.domyn.com 3 2026-07-11 2026-09-09 ok
nginxsalvatore.demo.domyn.com 2 2026-07-09 2026-07-09 nxdomain
api.demo.domyn.com 6 2026-04-20 2026-08-18 ok
fec-ui.demo.domyn.com 3 2026-07-11 2026-09-09 ok
vannacci-alignment-report-ui.demo.domyn.com 2 2026-07-24 2026-07-24 ok
fec-tools.demo.domyn.com 3 2026-07-11 2026-09-09 ok
domynshift.demo.domyn.com 3 2026-07-08 2026-09-06 ok
devops-mcp1.mcp.domyn.com 13 2026-04-20 2026-06-29 ok
sociosage.mcp.domyn.com 2 2026-08-04 2026-10-03 ok
fincantieri-erm.mcp.domyn.com 9 2026-04-22 2026-08-28 ok
demo-watchmen.mcp.domyn.com 5 2026-05-20 2026-09-16 ok
bper-watchmen.mcp.domyn.com 6 2026-05-05 2026-09-01 ok
fsi-neurosym-dq.mcp.domyn.com 2 2026-08-04 2026-10-03 ok
demo-prototypes.mcp.domyn.com 1 2026-08-28 2026-08-28 ok
app1.demo-prototypes.mcp.domyn.com 1 2026-08-28 2026-08-28 ok
app3.demo-prototypes.mcp.domyn.com 1 2026-09-21 2026-09-21 ok
bper-suggestions.mcp.domyn.com 5 2026-05-05 2026-09-03 ok
app.domyn.com 9 2026-05-21 2026-09-18 ok
*.app.domyn.com 1 2026-09-17 2026-09-17 —
demo-preprod-uda.app.domyn.com 1 2026-08-07 2026-08-07 ok
staging-uda.app.domyn.com 1 2026-08-06 2026-08-06 ok
demo-uda.app.domyn.com 3 2026-06-09 2026-08-08 ok
demo-finsage.app.domyn.com 3 2026-06-08 2026-08-07 ok
fincantieri-teki.app.domyn.com 5 2026-04-30 2026-08-29 ok
s3.fincantieri-teki.app.domyn.com 5 2026-05-05 2026-09-03 ok
demo-teki.app.domyn.com 5 2026-05-28 2026-09-24 ok
api.app.domyn.com 8 2026-05-21 2026-09-18 ok
login.app.domyn.com 8 2026-07-15 2026-09-13 ok
portainer.domyn.com 2 2026-05-14 2026-05-14 nxdomain
oauth.crystal-qa-azure-us.domyn.com 4 2026-06-10 2026-09-16 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/domyn.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/domyn.com.