Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

27 hosts · 453 ms

HostCertsFirst seenLast seenDNS
yobbers.com 56 2026-04-21 2026-09-24 ok
*.yobbers.com 36 2026-04-21 2026-09-07 —
email.e.yobbers.com 10 2026-04-15 2026-08-11 nxdomain
staging.yobbers.com 11 2026-05-27 2026-09-22 ok
admin.staging.yobbers.com 13 2026-05-25 2026-09-20 ok
affiliates.staging.yobbers.com 9 2026-05-25 2026-09-21 ok
cms.staging.yobbers.com 4 2026-05-26 2026-05-26 nxdomain
ats.staging.yobbers.com 9 2026-05-26 2026-09-21 ok
api.yobbers.com 4 2026-06-05 2026-10-03 ok
email.mail.yobbers.com 10 2026-06-01 2026-09-27 nxdomain
admin.yobbers.com 10 2026-04-25 2026-08-21 ok
staging.admin.yobbers.com 10 2026-04-11 2026-08-07 nxdomain
email.mailer.yobbers.com 14 2026-05-17 2026-09-12 nxdomain
affiliates.yobbers.com 10 2026-04-26 2026-08-22 ok
staging.affiliates.yobbers.com 6 2026-05-06 2026-09-01 nxdomain
email.mails.yobbers.com 14 2026-05-17 2026-09-12 nxdomain
cms.yobbers.com 9 2026-04-25 2026-06-23 nxdomain
staging.cms.yobbers.com 12 2026-05-29 2026-09-24 nxdomain
compass.yobbers.com 3 2026-04-22 2026-08-16 ok
ats.yobbers.com 10 2026-04-25 2026-08-22 ok
staging.ats.yobbers.com 12 2026-05-29 2026-09-24 nxdomain
t.yobbers.com 2 2026-09-18 2026-09-18 ok
ytst.yobbers.com 5 2026-05-05 2026-09-03 ok
ytst-preview.yobbers.com 5 2026-05-06 2026-09-04 ok
www.yobbers.com 10 2026-04-26 2026-08-22 ok
coolify.yobbers.com 12 2026-04-25 2026-08-21 nxdomain
*.coolify.yobbers.com 12 2026-04-25 2026-08-21 —

Programmatic access, with DNS A records: API GET /v1/hosts/yobbers.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/yobbers.com.