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.

10 hosts · 218 ms

HostCertsFirst seenLast seen
saintandsofia.com 23 2026-05-17 2026-09-27
*.saintandsofia.com 5 2026-07-23 2026-09-22
world.saintandsofia.com 12 2026-05-18 2026-09-26
monmouth.saintandsofia.com 5 2026-05-26 2026-09-23
uk.saintandsofia.com 17 2026-05-17 2026-09-12
euro.saintandsofia.com 12 2026-05-17 2026-09-25
ukreturns.saintandsofia.com 8 2026-05-15 2026-09-11
au.saintandsofia.com 17 2026-05-18 2026-09-27
www.saintandsofia.com 13 2026-05-18 2026-09-26
story.saintandsofia.com 5 2026-05-14 2026-05-27

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