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.

28 hosts · 227 ms

HostCertsFirst seenLast seen
ploom.ch 28 2026-05-31 2026-09-29
*.ploom.ch 12 2026-06-02 2026-09-29
eva.ploom.ch 16 2026-05-10 2026-09-05
gcc.ploom.ch 5 2026-04-29 2026-08-27
order-de.ploom.ch 10 2026-06-07 2026-10-03
m1.mail.ploom.ch 14 2026-04-17 2026-08-13
res1.mail.ploom.ch 8 2026-04-16 2026-08-12
t1.mail.ploom.ch 14 2026-04-18 2026-08-14
res5.mail.ploom.ch 14 2026-05-22 2026-09-17
t5.mail.ploom.ch 16 2026-05-23 2026-09-18
m6.mail.ploom.ch 22 2026-05-22 2026-09-17
res6.mail.ploom.ch 16 2026-05-22 2026-09-18
t6.mail.ploom.ch 10 2026-05-22 2026-09-17
order-en.ploom.ch 15 2026-06-07 2026-10-03
m1.info.ploom.ch 16 2026-04-20 2026-08-16
res1.info.ploom.ch 16 2026-04-19 2026-08-16
t1.info.ploom.ch 14 2026-04-18 2026-08-14
res5.info.ploom.ch 16 2026-05-22 2026-09-17
t5.info.ploom.ch 12 2026-05-22 2026-09-17
m6.info.ploom.ch 12 2026-05-22 2026-09-17
res6.info.ploom.ch 20 2026-05-22 2026-09-17
t6.info.ploom.ch 17 2026-05-23 2026-09-18
order-fr.ploom.ch 14 2026-06-07 2026-10-04
plus-rewards.ploom.ch 5 2026-05-04 2026-09-07
comms.ploom.ch 5 2026-07-09 2026-10-04
get.ploom.ch 1 2026-04-21 2026-04-21
staging.get.ploom.ch 1 2026-04-21 2026-04-21
www.ploom.ch 17 2026-06-01 2026-09-27

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