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.

43 hosts · 317 ms

HostCertsFirst seenLast seenDNS
supersmart.com 10 2026-05-11 2026-09-26 ok
*.supersmart.com 9 2026-07-28 2026-09-26 —
img.info2.supersmart.com 14 2026-04-28 2026-08-25 nxdomain
r.info2.supersmart.com 3 2026-06-15 2026-09-03 nxdomain
test2.supersmart.com 5 2026-05-01 2026-08-30 ok
img.info3.supersmart.com 14 2026-04-28 2026-08-24 nxdomain
r.info3.supersmart.com 3 2026-06-15 2026-09-03 ok
img.info4.supersmart.com 16 2026-05-11 2026-09-06 nxdomain
r.info4.supersmart.com 4 2026-04-11 2026-09-18 nxdomain
ca.supersmart.com 5 2026-05-11 2026-07-17 ok
ceac.supersmart.com 3 2026-04-17 2026-06-14 ok
doclec.supersmart.com 2 2026-05-07 2026-07-12 nxdomain
test.store.supersmart.com 4 2026-05-26 2026-07-26 nxdomain
bi-staging.supersmart.com 3 2026-07-20 2026-09-18 ok
apiconnector-staging.supersmart.com 2 2026-07-06 2026-07-06 ok
bi.supersmart.com 3 2026-07-20 2026-09-18 ok
trk.supersmart.com 4 2026-07-09 2026-09-04 ok
lp.supersmart.com 1 2026-08-19 2026-08-19 ok
apiconnector.supersmart.com 2 2026-07-06 2026-07-06 ok
msr.supersmart.com 2 2026-04-16 2026-06-09 ok
pages.supersmart.com 4 2026-04-18 2026-04-18 ok
app-affiliates.supersmart.com 1 2026-09-22 2026-09-22 ok
smartis.supersmart.com 1 2026-05-11 2026-05-11 ok
test2.smartis.supersmart.com 4 2026-05-22 2026-07-22 ok
test3.smartis.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
test4.smartis.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
test.smartis.supersmart.com 11 2026-05-22 2026-09-29 ok
funnels.supersmart.com 2 2026-04-20 2026-04-20 ok
us.supersmart.com 5 2026-05-11 2026-07-17 ok
smart-us.supersmart.com 4 2026-05-18 2026-07-17 nxdomain
test2.us.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
test3.us.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
test.us.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
smartus.supersmart.com 5 2026-05-11 2026-07-17 ok
test2.smartus.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
test3.smartus.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
test.smartus.supersmart.com 4 2026-05-22 2026-07-22 nxdomain
app-reviews.supersmart.com 4 2026-09-20 2026-09-24 ok
app-analysis-kit.supersmart.com 2 2026-09-23 2026-09-24 ok
app-order-xml-export.supersmart.com 2 2026-09-23 2026-09-24 ok
test.supersmart.com 7 2026-05-22 2026-09-29 ok
www.supersmart.com 1 2026-05-11 2026-05-11 ok
app-loyalty.supersmart.com 3 2026-09-21 2026-09-24 ok

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