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.

15 hosts · 215 ms

HostCertsFirst seenLast seen
self.com 16 2025-10-10 2026-10-05
*.self.com 16 2025-10-10 2026-10-05
c2.self.com 4 2026-03-16 2026-08-16
media.self.com 5 2025-07-30 2026-08-26
stag-media.self.com 5 2025-07-30 2026-08-26
c.self.com 1 2026-05-06 2026-05-06
qc.self.com 10 2025-09-23 2026-08-24
permutive.self.com 4 2026-04-16 2026-09-07
stag.self.com 1 2026-02-12 2026-02-12
interactive-stag.self.com 1 2026-06-18 2026-06-18
sli.self.com 2 2026-02-25 2026-07-13
link.self.com 6 2026-06-03 2026-10-01
on.self.com 4 2026-04-20 2026-09-05
video.self.com 1 2025-12-09 2025-12-09
sstats.self.com 4 2025-06-21 2026-06-23

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