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.

9 hosts · 182 ms

HostCertsFirst seenLast seen
socheers.net 9 2026-04-29 2026-09-30
*.socheers.net 5 2026-04-10 2026-09-30
os-mails.os-mails.socheers.net 1 2026-07-31 2026-07-31
ops.socheers.net 10 2026-05-17 2026-09-14
careers.socheers.net 4 2026-04-14 2026-08-12
accounts.socheers.net 12 2026-05-06 2026-09-04
reports.socheers.net 4 2026-04-20 2026-08-16
www.reports.socheers.net 4 2026-04-20 2026-08-16
www.socheers.net 8 2026-04-10 2026-09-10

Programmatic access: API GET /v1/hosts/socheers.net (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/socheers.net.