Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

29 hosts · 255 ms

HostCertsFirst seenLast seenDNS
*.athome.jp 1 2026-05-18 2026-05-18 —
origin.stg-img4.athome.jp 1 2025-11-09 2025-11-09 ok
origin.img4.athome.jp 1 2025-11-10 2025-11-10 ok
ma.athome.jp 10 2026-04-27 2026-09-24 ok
mdr.atbb.athome.jp 1 2026-05-18 2026-05-18 ok
btob.athome.jp 9 2026-05-08 2026-09-18 ok
cksys-backend.athome.jp 1 2026-05-19 2026-05-19 ok
cksys-file.athome.jp 1 2026-05-20 2026-05-20 ok
cksys-api.athome.jp 1 2026-05-19 2026-05-19 ok
stg.crm.athome.jp 1 2026-05-20 2026-05-20 ok
movein.athome.jp 1 2026-05-19 2026-05-19 ok
shd-movein.athome.jp 1 2026-05-19 2026-05-19 ok
manage-movein.athome.jp 1 2026-05-19 2026-05-19 ok
shd-manage-movein.athome.jp 1 2026-05-19 2026-05-19 ok
shd-entry-movein.athome.jp 1 2026-05-19 2026-05-19 ok
go.athome.jp 8 2026-05-08 2026-09-03 ok
shop.athome.jp 1 2026-05-19 2026-05-19 ok
faq.athome.jp 1 2026-05-18 2026-05-18 ok
atbb-r.athome.jp 1 2026-05-20 2026-05-20 ok
*.atbb-r.athome.jp 1 2026-05-20 2026-05-20 —
stg.customer.athome.jp 1 2026-05-19 2026-05-19 ok
pages.athome.jp 8 2026-05-07 2026-09-02 ok
business.athome.jp 1 2026-05-20 2026-05-20 ok
smss.athome.jp 1 2026-05-20 2026-05-20 ok
its.athome.jp 1 2026-05-20 2026-05-20 ok
cksys.athome.jp 1 2026-05-18 2026-05-18 ok
point.athome.jp 1 2026-05-19 2026-05-19 ok
cksys-report.athome.jp 1 2026-05-18 2026-05-18 ok
bldg-library.athome.jp 1 2026-05-18 2026-05-18 ok

Programmatic access, with DNS A records: API GET /v1/hosts/athome.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/athome.jp.