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.

23 hosts · 267 ms

HostCertsFirst seenLast seenDNS
radix.ad.jp 3 2025-09-11 2026-09-07 ok
*.radix.ad.jp 1 2025-10-06 2025-10-06 —
vm-islo-m1.radix.ad.jp 3 2026-03-31 2026-09-24 ok
dev.bingo2.radix.ad.jp 1 2026-09-25 2026-09-25 nodata
*.dev.bingo2.radix.ad.jp 1 2026-09-25 2026-09-25 —
questionnaire.radix.ad.jp 1 2025-10-27 2025-10-27 ok
catalog.radix.ad.jp 2 2025-07-16 2026-07-10 ok
rdxportal.radix.ad.jp 2 2025-07-04 2026-07-13 ok
senmon.radix.ad.jp 1 2026-01-13 2026-01-13 ok
info.radix.ad.jp 12 2026-04-14 2026-08-12 ok
www.info.radix.ad.jp 12 2026-04-14 2026-08-12 ok
bingo.radix.ad.jp 5 2026-05-16 2026-09-13 ok
stayup.radix.ad.jp 4 2026-03-18 2026-10-05 ok
rabit.radix.ad.jp 1 2025-10-17 2025-10-17 ok
www.rabit.radix.ad.jp 1 2025-10-17 2025-10-17 ok
recruit.radix.ad.jp 1 2025-11-10 2025-11-10 ok
support.radix.ad.jp 1 2026-03-04 2026-03-04 ok
www.support.radix.ad.jp 1 2026-03-04 2026-03-04 nxdomain
radixnw-dev.radix.ad.jp 5 2026-05-21 2026-09-18 ok
energy-div.radix.ad.jp 1 2026-04-14 2026-04-14 ok
radixnw-new.radix.ad.jp 5 2026-05-21 2026-09-18 ok
radixnw.radix.ad.jp 1 2025-12-19 2025-12-19 ok
www.radix.ad.jp 2 2025-09-11 2026-09-07 ok

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