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.

38 hosts · 229 ms

HostCertsFirst seenLast seen
ssl-test-1.com 27 2025-07-16 2026-10-06
*.ssl-test-1.com 1 2026-03-19 2026-03-19
test1.ssl-test-1.com 3 2026-08-10 2026-08-19
test2.ssl-test-1.com 4 2026-02-17 2026-09-11
testL13.ssl-test-1.com 2 2026-09-16 2026-09-16
test3.ssl-test-1.com 3 2026-05-22 2026-09-11
test4.ssl-test-1.com 1 2026-09-11 2026-09-11
test5.ssl-test-1.com 1 2026-08-19 2026-08-19
test6.ssl-test-1.com 4 2026-08-19 2026-08-20
www.test6.ssl-test-1.com 4 2026-08-19 2026-08-20
testqwac.ssl-test-1.com 1 2026-04-27 2026-04-27
testRevoc.ssl-test-1.com 1 2026-07-17 2026-07-17
nameshield.ssl-test-1.com 2 2025-09-16 2025-09-22
www.nameshield.ssl-test-1.com 2 2025-09-16 2025-09-22
fde.ssl-test-1.com 1 2025-10-09 2025-10-09
www.fde.ssl-test-1.com 1 2025-10-09 2025-10-09
melanie.ssl-test-1.com 1 2025-10-08 2025-10-08
www.melanie.ssl-test-1.com 1 2025-10-08 2025-10-08
testcnamemelanie.ssl-test-1.com 1 2025-10-09 2025-10-09
www.testcnamemelanie.ssl-test-1.com 1 2025-10-09 2025-10-09
testcname.ssl-test-1.com 1 2026-01-21 2026-01-21
www.testcname.ssl-test-1.com 1 2026-01-21 2026-01-21
sousdomaine.ssl-test-1.com 1 2026-10-06 2026-10-06
www.sousdomaine.ssl-test-1.com 1 2026-10-06 2026-10-06
test.souszone.ssl-test-1.com 2 2026-08-20 2026-08-20
www.test.souszone.ssl-test-1.com 2 2026-08-20 2026-08-20
f.ssl-test-1.com 3 2025-10-30 2025-10-31
ajout.san.ssl-test-1.com 3 2026-09-10 2026-09-22
testcbo.ssl-test-1.com 6 2026-06-05 2026-06-05
demo.ssl-test-1.com 1 2026-08-04 2026-08-04
testns.ssl-test-1.com 1 2026-09-09 2026-09-09
test.ssl-test-1.com 22 2025-11-05 2026-09-11
*.test.ssl-test-1.com 2 2026-01-21 2026-08-18
www.test.ssl-test-1.com 7 2025-11-05 2026-08-28
testtxt.ssl-test-1.com 1 2026-01-21 2026-01-21
www.testtxt.ssl-test-1.com 1 2026-01-21 2026-01-21
test-dv.ssl-test-1.com 1 2026-10-06 2026-10-06
www.ssl-test-1.com 9 2025-10-30 2026-10-06

Programmatic access: API GET /v1/hosts/ssl-test-1.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/ssl-test-1.com.