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.

30 hosts · 310 ms

HostCertsFirst seenLast seenDNS
*.commufa.jp 1 2025-11-17 2025-11-17 —
mypagedev2.commufa.jp 1 2026-05-13 2026-05-13 ok
area.commufa.jp 2 2025-09-09 2026-07-17 ok
124-18-48-15.area53c.commufa.jp 2 2026-06-30 2026-06-30 ok
cloud.smc.commufa.jp 1 2025-11-05 2025-11-05 ok
image.smc.commufa.jp 3 2025-12-03 2026-10-05 ok
click.smc.commufa.jp 1 2025-11-05 2025-11-05 ok
view.smc.commufa.jp 1 2025-11-06 2025-11-06 ok
ctc.commufa.jp 2 2026-02-19 2026-02-19 ok
mulesoft-prod.commufa.jp 1 2025-07-31 2025-07-31 nxdomain
service.commufa.jp 3 2025-07-30 2026-08-27 ok
mypage.commufa.jp 1 2025-11-25 2025-11-25 ok
welcome.commufa.jp 1 2025-08-28 2025-08-28 ok
safetytel.commufa.jp 1 2026-05-22 2026-05-22 ok
lp.commufa.jp 3 2026-05-04 2026-08-21 ok
help.commufa.jp 3 2025-09-26 2026-09-16 ok
faq.commufa.jp 1 2025-11-27 2025-11-27 nxdomain
*.cms.commufa.jp 1 2025-11-20 2025-11-20 —
*.stg.cms.commufa.jp 1 2025-11-20 2025-11-20 —
*.dev.cms.commufa.jp 1 2025-11-20 2025-11-20 —
st-pcms.commufa.jp 1 2026-07-29 2026-07-29 ok
st.commufa.jp 1 2026-07-08 2026-07-08 ok
test-welcome.web-test.commufa.jp 1 2025-08-28 2025-08-28 ok
dev.commufa.jp 1 2026-07-08 2026-07-08 nxdomain
area-dev.commufa.jp 2 2025-09-09 2026-07-17 ok
service-dev.commufa.jp 3 2025-07-30 2026-08-28 ok
mulesoft-dev.commufa.jp 1 2025-07-31 2025-07-31 nxdomain
mypagedev.commufa.jp 1 2025-11-05 2025-11-05 ok
webview.commufa.jp 7 2025-09-04 2026-08-20 ok
www.commufa.jp 2 2025-11-20 2026-07-08 ok

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