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.

44 hosts · 227 ms

HostCertsFirst seenLast seen
ploom.cz 31 2025-12-26 2026-09-22
*.ploom.cz 10 2026-04-12 2026-09-11
121.ploom.cz 1 2025-12-26 2025-12-26
prelive121.ploom.cz 1 2025-12-26 2025-12-26
dev121.ploom.cz 1 2025-12-26 2025-12-26
res5.ploom.cz 16 2026-05-23 2026-09-19
t5.ploom.cz 23 2026-05-22 2026-09-17
m6.ploom.cz 15 2026-05-22 2026-09-17
res6.ploom.cz 16 2026-05-23 2026-09-19
t6.ploom.cz 10 2026-05-22 2026-09-17
podpora.ploom.cz 3 2025-12-26 2026-06-16
www.podpora.ploom.cz 12 2026-04-19 2026-08-15
prelivepodpora.ploom.cz 3 2025-12-26 2026-06-16
devpodpora.ploom.cz 3 2025-12-26 2026-06-16
eva.ploom.cz 10 2026-05-09 2026-09-04
gcc.ploom.cz 5 2026-05-03 2026-09-01
res5.info.ploom.cz 14 2026-05-22 2026-09-17
t5.info.ploom.cz 21 2026-05-23 2026-09-19
m6.info.ploom.cz 12 2026-05-22 2026-09-17
res6.info.ploom.cz 16 2026-05-22 2026-09-17
t6.info.ploom.cz 11 2026-05-22 2026-09-17
order.ploom.cz 12 2026-04-19 2026-08-15
m1.ucet.ploom.cz 14 2026-04-18 2026-08-15
res1.ucet.ploom.cz 12 2026-04-21 2026-08-18
t1.ucet.ploom.cz 12 2026-04-18 2026-08-14
res5.ucet.ploom.cz 23 2026-05-22 2026-09-18
t5.ucet.ploom.cz 16 2026-05-22 2026-09-17
m6.ucet.ploom.cz 17 2026-05-22 2026-09-17
res6.ucet.ploom.cz 14 2026-05-22 2026-09-17
t6.ucet.ploom.cz 18 2026-05-23 2026-09-18
www.ploom.cz 16 2026-05-28 2026-09-23
m1.novinky.ploom.cz 14 2026-04-19 2026-08-15
res1.novinky.ploom.cz 12 2026-04-19 2026-08-15
t1.novinky.ploom.cz 14 2026-04-20 2026-08-17
res5.novinky.ploom.cz 17 2026-05-22 2026-09-17
t5.novinky.ploom.cz 16 2026-05-22 2026-09-18
m6.novinky.ploom.cz 10 2026-05-22 2026-09-17
res6.novinky.ploom.cz 10 2026-05-22 2026-09-17
t6.novinky.ploom.cz 18 2026-05-22 2026-09-17
res5.my.ploom.cz 22 2026-05-23 2026-09-19
t5.my.ploom.cz 14 2026-05-22 2026-09-17
m6.my.ploom.cz 20 2026-05-22 2026-09-17
res6.my.ploom.cz 18 2026-05-22 2026-09-17
t6.my.ploom.cz 20 2026-05-22 2026-09-17

Programmatic access: API GET /v1/hosts/ploom.cz (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/ploom.cz.