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.

13 hosts · 203 ms

HostCertsFirst seenLast seen
padistance.org 5 2026-05-21 2026-09-08
resource.padistance.org 5 2026-04-18 2026-10-09
link.padistance.org 5 2026-04-14 2026-10-06
mail.padistance.org 6 2026-04-15 2026-10-07
gmail.padistance.org 5 2026-04-15 2026-10-07
mmail.padistance.org 10 2026-04-26 2026-08-22
learn.padistance.org 4 2026-04-20 2026-08-13
go.padistance.org 8 2026-05-16 2026-09-11
docs.padistance.org 5 2026-04-15 2026-10-06
sites.padistance.org 6 2026-04-14 2026-10-06
sis.padistance.org 5 2026-04-14 2026-10-06
intranet.padistance.org 5 2026-06-03 2026-09-16
www.padistance.org 6 2026-04-13 2026-10-06

Programmatic access: API GET /v1/hosts/padistance.org (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/padistance.org.