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.

8 hosts · 222 ms

HostCertsFirst seenLast seen
wausm.education 13 2025-10-08 2026-09-23
shop.wausm.education 13 2026-05-12 2026-09-22
caels.wausm.education 4 2025-11-28 2026-01-07
www.caels.wausm.education 4 2025-11-28 2026-01-07
mta-sts.wausm.education 2 2025-08-14 2026-07-15
start.wausm.education 9 2026-08-04 2026-10-02
www.wausm.education 9 2025-10-08 2026-09-23
apply.wausm.education 5 2026-05-06 2026-08-31

Programmatic access: API GET /v1/hosts/wausm.education (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/wausm.education.