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 · 155 ms

HostCertsFirst seenLast seen
sonysonpo.co.jp 2 2025-09-04 2026-09-08
*.sonysonpo.co.jp 7 2025-06-30 2026-07-09
note.sonysonpo.co.jp 3 2026-04-21 2026-08-13
brg.sonysonpo.co.jp 3 2025-09-04 2026-09-08
search.sonysonpo.co.jp 3 2025-10-06 2026-10-07
with.sonysonpo.co.jp 4 2025-09-04 2026-09-24
mi.sonysonpo.co.jp 2 2026-03-06 2026-07-22
testsrvmock.sonysonpo.co.jp 2 2026-02-16 2026-07-09
cloud.mail.sonysonpo.co.jp 2 2026-08-27 2026-08-27
image.mail.sonysonpo.co.jp 10 2026-09-30 2026-10-07
click.mail.sonysonpo.co.jp 1 2026-09-30 2026-09-30
from.sonysonpo.co.jp 4 2025-09-04 2026-09-24
dlpo.sonysonpo.co.jp 1 2025-10-26 2025-10-26
photo.sonysonpo.co.jp 1 2026-01-15 2026-01-15
*.photo.sonysonpo.co.jp 2 2025-08-08 2026-07-07
map.sonysonpo.co.jp 2 2025-07-10 2026-07-21
gcp.sonysonpo.co.jp 4 2026-04-24 2026-10-08
clp.sonysonpo.co.jp 3 2026-05-24 2026-09-08
faq.sonysonpo.co.jp 2 2026-04-08 2026-10-08
ifs.sonysonpo.co.jp 3 2025-09-01 2026-08-26
sms.sonysonpo.co.jp 3 2025-09-04 2026-09-08
trs.sonysonpo.co.jp 1 2025-11-14 2025-11-14
jjss.sonysonpo.co.jp 1 2025-12-24 2025-12-24
sa-net.sonysonpo.co.jp 1 2026-06-25 2026-06-25
photo-dev.sonysonpo.co.jp 1 2026-02-07 2026-02-07
jjss-dev.sonysonpo.co.jp 1 2025-12-24 2025-12-24
www.sonysonpo.co.jp 3 2025-09-04 2026-09-08
ecology.sonysonpo.co.jp 4 2025-09-04 2026-09-24

Programmatic access: API GET /v1/hosts/sonysonpo.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/sonysonpo.co.jp.