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.

37 hosts · 367 ms

HostCertsFirst seenLast seenDNS
legionsecurity.ai 37 2026-05-11 2026-09-28 ok
*.legionsecurity.ai 14 2026-05-11 2026-09-22 —
dev2.ilc1.legionsecurity.ai 1 2026-01-27 2026-01-27 nxdomain
dev.ilc1.legionsecurity.ai 7 2025-12-02 2026-08-14 ok
use1.legionsecurity.ai 10 2026-03-21 2026-10-03 ok
dev.use1.legionsecurity.ai 3 2026-09-24 2026-09-24 ok
stage.uss1.legionsecurity.ai 5 2026-07-14 2026-09-11 ok
caw1.legionsecurity.ai 14 2025-07-09 2026-09-29 ok
dev.mew1.legionsecurity.ai 10 2026-05-15 2026-09-11 ok
usw1.legionsecurity.ai 11 2026-05-13 2026-09-12 ok
euc2.legionsecurity.ai 11 2025-07-13 2026-09-29 ok
stage.use2.legionsecurity.ai 13 2026-04-20 2026-10-01 ok
int.use2.legionsecurity.ai 12 2025-09-16 2026-09-05 ok
usw2.legionsecurity.ai 18 2026-04-18 2026-09-29 ok
euw2.legionsecurity.ai 13 2026-02-14 2026-08-31 ok
use4.legionsecurity.ai 12 2026-05-20 2026-09-15 ok
*.app-preview-prod.legionsecurity.ai 5 2026-05-10 2026-09-10 —
app-staging.legionsecurity.ai 13 2026-05-04 2026-09-26 ok
marketing.legionsecurity.ai 21 2026-05-25 2026-09-28 ok
legion-bench.legionsecurity.ai 3 2026-06-14 2026-08-09 ok
auth.legionsecurity.ai 21 2026-06-03 2026-09-30 ok
app.auth.legionsecurity.ai 23 2026-06-03 2026-09-29 ok
setup.auth.legionsecurity.ai 23 2026-06-03 2026-10-01 ok
email.legionsecurity.ai 7 2026-06-22 2026-08-21 ok
cyberbro.legionsecurity.ai 5 2026-08-06 2026-10-04 ok
app.legionsecurity.ai 18 2026-04-28 2026-09-30 ok
docs.legionsecurity.ai 6 2026-05-04 2026-08-30 ok
sekoia-docs.legionsecurity.ai 2 2026-08-13 2026-08-13 ok
static.tools.legionsecurity.ai 10 2026-04-25 2026-08-21 ok
thehive.tools.legionsecurity.ai 3 2025-08-07 2026-07-08 nodata
demo.tools.legionsecurity.ai 10 2026-05-20 2026-09-15 ok
careers.legionsecurity.ai 15 2026-05-20 2026-09-30 ok
events.legionsecurity.ai 3 2026-06-22 2026-08-21 ok
status.legionsecurity.ai 13 2026-05-07 2026-09-05 ok
support.legionsecurity.ai 1 2026-01-07 2026-01-07 ok
trust.legionsecurity.ai 14 2026-05-18 2026-09-14 ok
www.legionsecurity.ai 17 2026-05-21 2026-09-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/legionsecurity.ai (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/legionsecurity.ai.