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.

34 hosts · 301 ms

HostCertsFirst seenLast seenDNS
xobin.com 22 2026-04-18 2026-08-14 ok
*.xobin.com 22 2026-04-18 2026-08-14 —
demo-tl1.xobin.com 10 2026-05-03 2026-08-30 ok
demo-tld2.xobin.com 8 2026-05-03 2026-08-30 ok
stagingwebtest2.xobin.com 5 2026-05-12 2026-09-09 ok
question-media.xobin.com 2 2026-09-03 2026-09-03 ok
nura.xobin.com 2 2026-08-14 2026-08-14 ok
download.xobin.com 6 2026-07-20 2026-09-17 ok
staging-f.xobin.com 3 2026-05-15 2026-09-01 ok
api-assess-f.xobin.com 3 2026-04-30 2026-08-14 ok
staging.xobin.com 2 2026-05-19 2026-06-15 ok
research.xobin.com 4 2026-07-26 2026-09-23 ok
careerpath.xobin.com 8 2026-04-17 2026-08-14 ok
api-assess-i.xobin.com 3 2026-05-04 2026-08-20 ok
ai.xobin.com 12 2026-04-30 2026-06-28 ok
links.mail.xobin.com 5 2026-05-20 2026-09-17 ok
screen.xobin.com 12 2026-04-17 2026-08-20 ok
api-video.xobin.com 3 2026-05-15 2026-08-30 ok
api-compiler.xobin.com 6 2026-04-21 2026-09-30 ok
docs.xobin.com 3 2026-07-16 2026-09-14 ok
resources.xobin.com 4 2026-08-12 2026-08-12 ok
qualifiers.xobin.com 5 2026-05-15 2026-09-08 ok
masterclass.xobin.com 10 2026-04-26 2026-08-22 ok
api-assess.xobin.com 3 2026-05-04 2026-08-17 ok
interviews.xobin.com 3 2026-05-18 2026-09-05 ok
interact.xobin.com 5 2026-05-18 2026-09-14 ok
fit.xobin.com 8 2026-05-13 2026-09-08 ok
notify.fit.xobin.com 6 2026-06-14 2026-09-03 nodata
*.notify.fit.xobin.com 6 2026-06-14 2026-09-03 —
development.xobin.com 10 2026-05-07 2026-09-02 ok
stagingwebtest.xobin.com 5 2026-06-05 2026-10-03 ok
api-assess-v.xobin.com 3 2026-04-29 2026-08-15 ok
dev.xobin.com 3 2026-05-04 2026-08-20 ok
insight360-dev.xobin.com 12 2026-05-14 2026-09-09 ok

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