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.

41 hosts · 276 ms

HostCertsFirst seenLast seen
clarknuber.com 23 2026-04-21 2026-10-06
*.clarknuber.com 24 2025-12-22 2026-10-06
sma2.clarknuber.com 2 2026-04-22 2026-10-06
www.sma2.clarknuber.com 2 2026-04-22 2026-10-06
cnta2.clarknuber.com 8 2025-06-13 2026-07-13
www.cnta2.clarknuber.com 8 2025-06-13 2026-07-13
cnpink2.clarknuber.com 4 2025-10-10 2026-09-07
www.cnpink2.clarknuber.com 4 2025-10-10 2026-09-07
cnp2.clarknuber.com 2 2026-01-23 2026-03-02
www.cnp2.clarknuber.com 2 2026-01-23 2026-03-02
sma.clarknuber.com 2 2026-01-26 2026-02-17
www.sma.clarknuber.com 2 2026-01-26 2026-02-17
ksa.clarknuber.com 4 2026-03-11 2026-08-25
www.ksa.clarknuber.com 4 2026-03-11 2026-08-25
cnta.clarknuber.com 2 2025-12-04 2026-01-05
www.cnta.clarknuber.com 2 2025-12-04 2026-01-05
flsc.clarknuber.com 3 2026-04-11 2026-09-28
www.flsc.clarknuber.com 3 2026-04-11 2026-09-28
zag.clarknuber.com 2 2025-12-29 2026-01-20
www.zag.clarknuber.com 2 2025-12-29 2026-01-20
zig.clarknuber.com 1 2026-02-04 2026-02-04
www.zig.clarknuber.com 1 2026-02-04 2026-02-04
email.clarknuber.com 12 2026-04-30 2026-08-27
info.clarknuber.com 14 2026-04-30 2026-08-27
star.clarknuber.com 6 2026-02-18 2026-09-21
www.star.clarknuber.com 6 2026-02-18 2026-09-21
proposalbuilder.clarknuber.com 4 2026-10-01 2026-10-01
das.clarknuber.com 1 2026-03-06 2026-03-06
www.das.clarknuber.com 1 2026-03-06 2026-03-06
dads.clarknuber.com 1 2026-03-06 2026-03-06
www.dads.clarknuber.com 1 2026-03-06 2026-03-06
cps.clarknuber.com 5 2026-02-01 2026-10-01
www.cps.clarknuber.com 5 2026-02-01 2026-10-01
cnlaptops.clarknuber.com 2 2026-01-04 2026-01-27
www.cnlaptops.clarknuber.com 2 2026-01-04 2026-01-27
mta-sts.clarknuber.com 18 2026-05-05 2026-09-13
*.mta-sts.clarknuber.com 2 2026-05-18 2026-05-18
trust.clarknuber.com 5 2026-07-23 2026-09-20
www.clarknuber.com 4 2026-06-07 2026-10-05
zzz.clarknuber.com 2 2025-06-27 2026-06-28
www.zzz.clarknuber.com 2 2025-06-27 2026-06-28

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