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 · 395 ms

HostCertsFirst seenLast seenDNS
stillwater.com 18 2025-09-08 2026-08-14 ok
*.stillwater.com 17 2025-09-03 2026-08-14 —
nexus3.stillwater.com 9 2026-05-01 2026-09-20 nxdomain
cs-expe01-oma.stillwater.com 4 2025-09-08 2026-10-07 ok
gitlab.stillwater.com 9 2026-05-01 2026-09-20 nxdomain
utility-prd.stillwater.com 9 2026-05-01 2026-09-20 nxdomain
collab-edge.stillwater.com 2 2026-10-07 2026-10-07 ok
10zig.stillwater.com 5 2026-04-28 2026-08-30 ok
vdi.stillwater.com 5 2026-04-30 2026-09-06 ok
jaxvdi.stillwater.com 5 2026-04-30 2026-09-06 ok
cloud.mail.stillwater.com 1 2025-09-19 2025-09-19 nxdomain
image.mail.stillwater.com 3 2025-08-29 2026-07-13 ok
click.mail.stillwater.com 1 2025-09-19 2025-09-19 nxdomain
view.mail.stillwater.com 1 2025-09-19 2025-09-19 nxdomain
omavpn.stillwater.com 5 2026-04-29 2026-09-06 ok
jervpn.stillwater.com 4 2026-04-14 2026-08-16 ok
jaxvpn.stillwater.com 5 2026-04-30 2026-09-06 ok
bo.stillwater.com 7 2026-05-15 2026-09-20 nxdomain
sonar.stillwater.com 9 2026-05-01 2026-09-20 nxdomain
bugs.stillwater.com 9 2026-05-01 2026-09-20 nxdomain
jenkins.stillwater.com 9 2026-05-01 2026-09-20 nxdomain
nexus.stillwater.com 9 2026-05-01 2026-09-20 nxdomain
cs-expe01-jax.stillwater.com 4 2025-09-08 2026-10-07 ok

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