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 · 246 ms

HostCertsFirst seenLast seen
reelist.com 11 2026-05-18 2026-09-13
help.reelist.com 5 2026-05-27 2026-09-24
app.reelist.com 4 2026-04-15 2026-08-17
docs.reelist.com 1 2026-08-31 2026-08-31
status.reelist.com 5 2026-05-23 2026-09-20
trust.reelist.com 10 2026-04-29 2026-08-26
checkout.reelist.com 8 2026-04-21 2026-08-17
www.reelist.com 6 2026-05-18 2026-09-13

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