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.

12 hosts · 189 ms

HostCertsFirst seenLast seen
reekon.tools 27 2026-04-21 2026-10-02
*.reekon.tools 14 2026-05-01 2026-09-24
store.reekon.tools 17 2026-04-16 2026-09-28
affiliate.reekon.tools 5 2026-05-18 2026-09-16
blog.reekon.tools 5 2026-04-28 2026-09-15
www.blog.reekon.tools 5 2026-04-28 2026-09-15
meqog.reekon.tools 14 2026-06-04 2026-10-01
forum.reekon.tools 5 2026-04-23 2026-08-21
sms.reekon.tools 9 2026-05-18 2026-09-13
orders.reekon.tools 5 2026-05-18 2026-09-15
support.reekon.tools 5 2026-06-01 2026-09-29
www.reekon.tools 15 2026-04-19 2026-10-02

Programmatic access: API GET /v1/hosts/reekon.tools (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/reekon.tools.