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.

42 hosts · 399 ms

HostCertsFirst seenLast seenDNS
usenext.com 59 2026-04-12 2026-10-06 ok
*.usenext.com 41 2026-04-24 2026-09-13 —
ma.usenext.com 12 2026-04-12 2026-10-07 ok
did.usenext.com 10 2026-04-25 2026-09-21 ok
affiliate.usenext.com 18 2026-04-12 2026-10-06 ok
www.affiliate.usenext.com 16 2026-04-12 2026-10-06 ok
email.mg.usenext.com 5 2026-05-26 2026-09-24 ok
img.mailing.usenext.com 6 2026-05-07 2026-09-03 ok
r.mailing.usenext.com 3 2026-06-28 2026-09-16 ok
auth.usenext.com 18 2026-04-12 2026-10-06 ok
api.usenext.com 14 2026-04-12 2026-10-06 ok
trck.usenext.com 10 2026-05-01 2026-08-21 ok
webhook.usenext.com 12 2026-04-12 2026-08-08 ok
premium.usenext.com 13 2026-04-19 2026-08-21 ok
aktion.usenext.com 14 2026-04-12 2026-10-06 ok
help.usenext.com 10 2026-04-12 2026-10-06 ok
link.newsletter.usenext.com 22 2026-05-24 2026-09-20 ok
email.newsletter.usenext.com 5 2026-05-30 2026-09-27 ok
cms.usenext.com 14 2026-04-12 2026-10-06 ok
dionysos.usenext.com 8 2026-04-10 2026-10-04 ok
bacchus.usenext.com 5 2026-05-17 2026-10-05 ok
janus.usenext.com 12 2026-04-12 2026-10-06 ok
news.usenext.com 4 2026-04-24 2026-09-14 ok
www.news.usenext.com 1 2026-04-24 2026-04-24 nxdomain
reset.usenext.com 18 2026-04-12 2026-10-06 ok
content.usenext.com 14 2026-04-12 2026-08-09 ok
support.usenext.com 20 2026-04-12 2026-10-06 ok
ingress-monitoring-test.usenext.com 16 2026-04-12 2026-10-06 ok
gateway-monitoring-test.usenext.com 14 2026-06-08 2026-10-04 ok
*.test.usenext.com 29 2026-05-06 2026-09-10 —
janus-staging.test.usenext.com 16 2026-04-12 2026-10-06 ok
www-staging.test.usenext.com 12 2026-04-12 2026-08-09 ok
auth.test.usenext.com 16 2026-04-12 2026-10-07 ok
api.test.usenext.com 14 2026-04-12 2026-10-06 ok
emails.test.usenext.com 20 2026-04-12 2026-10-06 ok
cms.test.usenext.com 20 2026-04-12 2026-10-06 ok
janus.test.usenext.com 15 2026-04-12 2026-10-06 ok
www.test.usenext.com 18 2026-04-12 2026-10-06 ok
sst.usenext.com 4 2026-06-04 2026-09-20 ok
*.dev.usenext.com 19 2026-05-06 2026-09-10 —
www.usenext.com 20 2026-04-12 2026-10-06 ok
try.usenext.com 14 2026-04-12 2026-10-07 ok

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