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 · 198 ms

HostCertsFirst seenLast seen
lifenet-seimei.co.jp 7 2025-07-10 2026-07-21
*.lifenet-seimei.co.jp 8 2025-07-10 2026-07-21
moneyforward.lifenet-seimei.co.jp 2 2026-02-12 2026-02-12
faq.moneyforward.lifenet-seimei.co.jp 1 2026-01-22 2026-01-22
core.lifenet-seimei.co.jp 2 2026-04-19 2026-09-19
secure.lifenet-seimei.co.jp 2 2026-02-12 2026-02-12
note.lifenet-seimei.co.jp 4 2026-05-29 2026-09-24
fyebmf.lifenet-seimei.co.jp 2 2026-06-07 2026-08-10
uag.lifenet-seimei.co.jp 1 2025-11-17 2025-11-17
cloud.mailstg.lifenet-seimei.co.jp 1 2026-05-11 2026-05-11
image.mailstg.lifenet-seimei.co.jp 3 2026-01-29 2026-05-07
click.mailstg.lifenet-seimei.co.jp 1 2026-05-07 2026-05-07
view.mailstg.lifenet-seimei.co.jp 1 2026-05-11 2026-05-11
faq.7fi.lifenet-seimei.co.jp 1 2026-01-22 2026-01-22
ssi.lifenet-seimei.co.jp 2 2026-04-19 2026-09-19
sf-ssi.lifenet-seimei.co.jp 2 2026-01-08 2026-01-08
cloud.mail.lifenet-seimei.co.jp 3 2026-04-14 2026-09-15
image.mail.lifenet-seimei.co.jp 3 2026-04-09 2026-09-09
click.mail.lifenet-seimei.co.jp 3 2026-04-14 2026-09-15
view.mail.lifenet-seimei.co.jp 3 2026-04-14 2026-09-15
dam.lifenet-seimei.co.jp 1 2026-04-13 2026-04-13
frm.lifenet-seimei.co.jp 31 2025-12-15 2025-12-15
info.lifenet-seimei.co.jp 14 2026-04-16 2026-08-13
lp.lifenet-seimei.co.jp 3 2026-06-02 2026-09-16
gi-pp.lifenet-seimei.co.jp 2 2026-06-17 2026-06-17
*.faq.lifenet-seimei.co.jp 1 2026-01-22 2026-01-22
www.faq.lifenet-seimei.co.jp 2 2026-01-08 2026-01-08
ir.lifenet-seimei.co.jp 2 2025-08-07 2026-08-14
scs.lifenet-seimei.co.jp 2 2026-02-01 2026-02-01
mcms-images.lifenet-seimei.co.jp 5 2026-05-01 2026-08-29
mcms-files.lifenet-seimei.co.jp 5 2026-05-01 2026-08-28
api-mkt.lifenet-seimei.co.jp 1 2025-11-17 2025-11-17
gi-pt.lifenet-seimei.co.jp 1 2026-06-17 2026-06-17
au.lifenet-seimei.co.jp 4 2025-08-07 2026-08-24
faq.au.lifenet-seimei.co.jp 5 2025-09-03 2026-09-16
test-edu.lifenet-seimei.co.jp 1 2025-11-14 2025-11-14
vmenu.lifenet-seimei.co.jp 1 2025-10-02 2025-10-02
www.lifenet-seimei.co.jp 1 2026-05-27 2026-05-27

Programmatic access: API GET /v1/hosts/lifenet-seimei.co.jp (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/lifenet-seimei.co.jp.