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.

37 hosts · 210 ms

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HostCertsFirst seenLast seen
amberstudent.com 4 2026-02-18 2026-07-07
*.amberstudent.com 10 2025-09-24 2026-10-11
img.mailers1.amberstudent.com 16 2026-04-29 2026-08-25
r.mailers1.amberstudent.com 5 2026-05-03 2026-10-11
invoice.amberstudent.com 10 2026-05-21 2026-09-18
tolgee.amberstudent.com 5 2026-04-27 2026-08-25
posthog.amberstudent.com 11 2026-06-01 2026-09-29
storybook.amberstudent.com 1 2026-01-12 2026-01-12
*.storybook.amberstudent.com 1 2026-01-12 2026-01-12
help-zendesk.amberstudent.com 2 2026-06-06 2026-06-06
*.internal.amberstudent.com 1 2026-07-15 2026-07-15
bchina.internal.amberstudent.com 12 2026-04-25 2026-08-21
b.internal.amberstudent.com 10 2026-04-25 2026-08-22
exam.internal.amberstudent.com 10 2026-04-27 2026-08-24
n.internal.amberstudent.com 8 2026-05-06 2026-09-01
pages.internal.amberstudent.com 9 2026-05-18 2026-09-13
plus.internal.amberstudent.com 6 2026-04-25 2026-08-21
podcast.internal.amberstudent.com 10 2026-04-25 2026-08-21
pritunl.amberstudent.com 3 2026-05-23 2026-08-11
help-cn.amberstudent.com 2 2026-06-06 2026-06-06
zohotp-integration.amberstudent.com 4 2026-06-05 2026-10-03
delivery.info.amberstudent.com 4 2026-06-11 2026-09-28
help.amberstudent.com 181 2026-04-21 2026-10-14
weekender.amberstudent.com 8 2026-04-29 2026-08-25
china-pages.amberstudent.com 5 2026-06-04 2026-10-08
global-pages.amberstudent.com 4 2026-06-03 2026-10-03
rooms.amberstudent.com 5 2026-08-06 2026-10-04
videos.amberstudent.com 10 2026-05-28 2026-09-23
img.mailers.amberstudent.com 10 2026-05-07 2026-09-02
r.mailers.amberstudent.com 3 2026-06-17 2026-09-05
assets.amberstudent.com 6 2026-04-25 2026-08-21
prod-static-assets.amberstudent.com 13 2026-04-25 2026-08-21
webflow-assets.amberstudent.com 12 2026-04-26 2026-08-22
aspirants.amberstudent.com 7 2026-05-25 2026-09-20
status.amberstudent.com 3 2026-06-20 2026-08-20
passbolt.amberstudent.com 5 2026-05-21 2026-09-19
delivery.amberstudent.com 5 2026-06-07 2026-09-22

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