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.

23 hosts · 360 ms

HostCertsFirst seenLast seenDNS
goentri.com 12 2026-02-26 2026-10-02 ok
*.goentri.com 12 2026-02-26 2026-10-02 —
beta.goentri.com 7 2026-05-12 2026-09-15 ok
testhub.goentri.com 4 2026-04-16 2026-08-16 ok
sandbox-prod.goentri.com 5 2026-05-21 2026-09-26 ok
dashboard.goentri.com 5 2026-05-15 2026-09-18 ok
staging.goentri.com 5 2026-05-11 2026-09-10 ok
ssltesting.goentri.com 4 2026-07-10 2026-09-28 ok
prod.api.goentri.com 2 2026-09-04 2026-09-04 nodata
staging.api.goentri.com 2 2026-09-03 2026-09-03 nodata
dev.api.goentri.com 3 2026-08-19 2026-09-02 nodata
ssl.goentri.com 4 2026-06-05 2026-06-10 ok
mcp.goentri.com 5 2026-04-27 2026-08-31 ok
dev.mcp.goentri.com 5 2026-04-26 2026-08-30 ok
app.goentri.com 5 2026-05-10 2026-09-12 ok
storybook.app.goentri.com 2 2026-05-21 2026-05-21 ok
powermonitor.goentri.com 3 2026-05-22 2026-08-14 ok
ionos.goentri.com 5 2026-05-29 2026-10-02 ok
staging.websocket.goentri.com 2 2026-09-03 2026-09-03 nodata
dev.websocket.goentri.com 2 2026-09-03 2026-09-03 nodata
ssl-test.goentri.com 2 2026-05-23 2026-05-23 ok
dev.goentri.com 5 2026-05-29 2026-10-01 ok
storybook.dev.goentri.com 2 2026-04-30 2026-04-30 ok

Programmatic access, with DNS A records: API GET /v1/hosts/goentri.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/goentri.com.