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 · 269 ms

HostCertsFirst seenLast seen
newks.com 37 2026-04-22 2026-09-20
*.newks.com 24 2026-04-22 2026-09-20
office.newks.com 10 2026-04-29 2026-08-25
staging.newks.com 14 2026-05-25 2026-09-20
catering.newks.com 2 2026-02-03 2026-07-09
mail.newks.com 9 2026-06-16 2026-08-15
ftp.newks.com 12 2026-05-25 2026-09-20
order.newks.com 10 2026-05-25 2026-09-20
files.newks.com 1 2026-08-13 2026-08-13
newkscares.newks.com 9 2026-05-25 2026-09-20
locations.newks.com 13 2026-05-25 2026-09-20
mta-sts.newks.com 5 2026-04-30 2026-08-28
www.newks.com 17 2026-04-27 2026-08-28

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