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.

24 hosts · 259 ms

HostCertsFirst seenLast seen
sedex.com 11 2026-05-27 2026-09-23
*.sedex.com 11 2026-05-27 2026-09-23
data.sedex.com 2 2025-08-13 2026-07-14
dev.data.sedex.com 2 2025-08-13 2026-07-14
groove.sedex.com 7 2026-05-13 2026-09-11
api.sedex.com 1 2026-01-15 2026-01-15
api-temp.api.sedex.com 1 2026-04-16 2026-04-16
info.sedex.com 9 2026-05-23 2026-09-18
lp.sedex.com 5 2026-05-26 2026-09-23
app.sedex.com 2 2025-09-18 2026-08-18
maintenance.app.sedex.com 1 2026-01-15 2026-01-15
auth.app.sedex.com 3 2026-04-14 2026-09-14
admin.app.sedex.com 1 2025-12-10 2025-12-10
sso.app.sedex.com 2 2025-08-17 2026-07-18
auth-temp.app.sedex.com 1 2026-04-16 2026-04-16
metrics.app.sedex.com 1 2026-02-04 2026-02-04
legacy-redirects.app.sedex.com 1 2026-01-11 2026-01-11
developer.sedex.com 1 2025-12-04 2025-12-04
sales.sedex.com 4 2026-06-11 2026-10-09
devops.sedex.com 6 2026-06-12 2026-10-10
careers.sedex.com 10 2026-05-28 2026-09-24
requests.sedex.com 7 2026-06-11 2026-10-10
content.sedex.com 5 2026-06-01 2026-09-29
support.sedex.com 6 2026-06-11 2026-10-09

Programmatic access: API GET /v1/hosts/sedex.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/sedex.com.