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.

57 hosts · 195 ms

HostCertsFirst seenLast seen
antimatter.io 15 2026-06-01 2026-09-28
*.antimatter.io 15 2026-06-01 2026-09-28
argocd.eu-central-1.dbrx-prod.antimatter.io 1 2025-10-02 2025-10-02
api.eu-central-1.dbrx-prod.antimatter.io 1 2025-10-02 2025-10-02
ui.eu-central-1.dbrx-prod.antimatter.io 1 2025-10-02 2025-10-02
app.eu-central-1.dbrx-prod.antimatter.io 1 2025-10-02 2025-10-02
argocd.us-east-1.dbrx-prod.antimatter.io 3 2025-09-05 2026-08-06
api.us-east-1.dbrx-prod.antimatter.io 3 2025-09-05 2026-08-06
ui.us-east-1.dbrx-prod.antimatter.io 3 2025-09-05 2026-08-06
app.us-east-1.dbrx-prod.antimatter.io 2 2025-09-05 2025-09-05
argocd.ap-southeast-2.dbrx-prod.antimatter.io 1 2025-09-30 2025-09-30
api.ap-southeast-2.dbrx-prod.antimatter.io 1 2025-09-30 2025-09-30
ui.ap-southeast-2.dbrx-prod.antimatter.io 1 2025-09-30 2025-09-30
app.ap-southeast-2.dbrx-prod.antimatter.io 1 2025-09-30 2025-09-30
argocd.us-west-2.dbrx-prod.antimatter.io 1 2025-09-10 2025-09-10
api.us-west-2.dbrx-prod.antimatter.io 1 2025-09-10 2025-09-10
ui.us-west-2.dbrx-prod.antimatter.io 1 2025-09-10 2025-09-10
app.us-west-2.dbrx-prod.antimatter.io 1 2025-09-10 2025-09-10
argocd.dbrx-prod.antimatter.io 1 2025-09-05 2025-09-05
api.dbrx-prod.antimatter.io 1 2025-09-05 2025-09-05
ui.dbrx-prod.antimatter.io 1 2025-09-05 2025-09-05
app.dbrx-prod.antimatter.io 1 2025-09-05 2025-09-05
argocd.us-east-1.dbrx-stage.antimatter.io 1 2025-10-17 2025-10-17
api.us-east-1.dbrx-stage.antimatter.io 1 2025-10-17 2025-10-17
ui.us-east-1.dbrx-stage.antimatter.io 1 2025-10-17 2025-10-17
app.us-east-1.dbrx-stage.antimatter.io 1 2025-10-17 2025-10-17
dasl-migrate.antimatter.io 2 2025-08-06 2026-07-07
pkg.antimatter.io 2 2025-09-01 2026-08-02
api.antimatter.io 1 2026-04-28 2026-04-28
gcp-uswest1-c0.cell.api.antimatter.io 1 2026-05-18 2026-05-18
argo.api.antimatter.io 2 2026-04-16 2026-05-29
argocd.prod.sl.antimatter.io 2 2026-03-06 2026-07-22
api.prod.sl.antimatter.io 1 2026-01-21 2026-01-21
ui.prod.sl.antimatter.io 1 2026-01-29 2026-01-29
app.prod.sl.antimatter.io 1 2026-01-21 2026-01-21
argocd.migrate.sl.antimatter.io 2 2025-08-06 2026-07-07
api.migrate.sl.antimatter.io 2 2025-08-06 2026-07-07
ui.migrate.sl.antimatter.io 3 2025-08-06 2026-07-07
app.migrate.sl.antimatter.io 2 2025-08-06 2026-07-07
docs.sl.antimatter.io 5 2026-04-23 2026-10-05
dasl.antimatter.io 1 2026-01-29 2026-01-29
app.antimatter.io 2 2026-06-05 2026-06-05
container.antimatter.io 5 2026-05-06 2026-08-18
docs.antimatter.io 3 2025-10-19 2026-09-19
*.docs.antimatter.io 3 2025-10-19 2026-09-19
get.antimatter.io 3 2026-05-17 2026-09-03
trust.antimatter.io 10 2026-05-15 2026-09-11
dasl-dev.antimatter.io 1 2025-08-06 2025-08-06
argocd.us-east-1.dbrx-dev.antimatter.io 2 2025-09-12 2025-09-12
api.us-east-1.dbrx-dev.antimatter.io 3 2025-08-28 2025-09-12
ui.us-east-1.dbrx-dev.antimatter.io 3 2025-08-28 2025-09-12
app.us-east-1.dbrx-dev.antimatter.io 3 2025-08-28 2025-09-12
argocd.dbrx-dev.antimatter.io 1 2025-09-01 2025-09-01
api.dbrx-dev.antimatter.io 1 2025-09-01 2025-09-01
ui.dbrx-dev.antimatter.io 1 2025-09-01 2025-09-01
app.dbrx-dev.antimatter.io 1 2025-09-01 2025-09-01
dev.registry.antimatter.io 1 2026-02-07 2026-02-07

Programmatic access: API GET /v1/hosts/antimatter.io (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/antimatter.io.