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.

22 hosts · 211 ms

HostCertsFirst seenLast seen
ploom.tw 27 2026-04-05 2026-09-23
*.ploom.tw 17 2026-04-05 2026-09-21
eva.ploom.tw 16 2026-05-04 2026-08-31
gcc.ploom.tw 5 2026-04-24 2026-08-22
m1.mail.ploom.tw 18 2026-06-03 2026-09-29
res1.mail.ploom.tw 16 2026-06-02 2026-09-28
t1.mail.ploom.tw 12 2026-06-03 2026-09-29
res5.mail.ploom.tw 16 2026-05-22 2026-09-17
t5.mail.ploom.tw 16 2026-05-22 2026-09-17
m6.mail.ploom.tw 14 2026-05-22 2026-09-17
res6.mail.ploom.tw 15 2026-05-22 2026-09-17
t6.mail.ploom.tw 19 2026-05-23 2026-09-18
m1.info.ploom.tw 20 2026-05-31 2026-09-26
res1.info.ploom.tw 13 2026-05-30 2026-09-25
t1.info.ploom.tw 14 2026-05-29 2026-09-24
res5.info.ploom.tw 14 2026-05-22 2026-09-17
t5.info.ploom.tw 17 2026-05-22 2026-09-18
m6.info.ploom.tw 10 2026-05-22 2026-09-17
res6.info.ploom.tw 13 2026-05-22 2026-09-18
t6.info.ploom.tw 14 2026-05-22 2026-09-17
order.ploom.tw 14 2026-04-19 2026-08-15
www.ploom.tw 18 2026-05-27 2026-09-22

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