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.

43 hosts · 342 ms

HostCertsFirst seenLast seenDNS
oximy.com 16 2026-04-15 2026-09-29 ok
*.oximy.com 11 2026-05-28 2026-09-29 —
challenge.oximy.com 3 2026-07-08 2026-09-09 ok
home.oximy.com 2 2026-05-04 2026-05-04 nxdomain
clickhouse.oximy.com 3 2026-09-15 2026-09-15 ok
linkedin-clickhouse.oximy.com 2 2026-09-15 2026-09-15 ok
staging.oximy.com 3 2026-06-24 2026-08-24 ok
api.staging.oximy.com 6 2026-06-24 2026-08-25 ok
clerk.staging.oximy.com 6 2026-06-23 2026-08-22 ok
otel.staging.oximy.com 3 2026-06-24 2026-08-23 ok
accounts.staging.oximy.com 6 2026-06-23 2026-08-21 ok
fieldwatch.oximy.com 3 2026-09-30 2026-09-30 ok
app.byrh.oximy.com 2 2026-08-28 2026-08-28 ok
api.oximy.com 10 2026-05-11 2026-09-10 ok
internal-api.oximy.com 6 2026-06-18 2026-08-19 ok
byrh.api.oximy.com 2 2026-08-19 2026-08-19 nxdomain
by.api.oximy.com 2 2026-09-07 2026-10-05 ok
sidekick.oximy.com 3 2026-07-20 2026-09-19 ok
usercontent.sidekick.oximy.com 3 2026-07-22 2026-09-23 ok
clerk.oximy.com 6 2026-05-04 2026-08-30 ok
otel.oximy.com 4 2026-06-08 2026-10-06 ok
crm.oximy.com 1 2026-08-12 2026-08-12 ok
api.platform.oximy.com 3 2026-07-02 2026-08-31 ok
byrh.api.platform.oximy.com 2 2026-08-19 2026-08-19 ok
by.api.platform.oximy.com 2 2026-09-07 2026-10-05 ok
gtm.oximy.com 4 2026-04-13 2026-08-15 ok
recon.oximy.com 6 2026-05-30 2026-10-03 ok
mcp.oximy.com 2 2026-08-06 2026-10-05 ok
app.oximy.com 4 2026-04-16 2026-08-21 ok
trustcenter.oximy.com 2 2025-12-04 2025-12-04 ok
docs.oximy.com 3 2026-07-12 2026-09-15 ok
*.docs.oximy.com 3 2026-06-11 2026-08-11 —
models.oximy.com 3 2026-06-18 2026-08-16 ok
external-systems.oximy.com 1 2026-08-28 2026-08-28 ok
lens.oximy.com 3 2026-04-15 2026-06-15 nxdomain
accounts.oximy.com 10 2026-05-05 2026-08-31 ok
status.oximy.com 3 2026-04-16 2026-06-15 nxdomain
copilot.oximy.com 3 2026-04-17 2026-06-18 nxdomain
www.oximy.com 4 2026-04-17 2026-08-19 ok
relay.oximy.com 3 2026-07-04 2026-09-02 ok
pay.oximy.com 5 2026-07-28 2026-09-25 ok
wiley.oximy.com 2 2026-05-28 2026-05-28 nxdomain
*.proxy.oximy.com 6 2026-06-01 2026-06-02 —

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