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.

100 hosts (first page) · 436 ms

HostCertsFirst seenLast seenDNS
auone.jp 2 2025-11-13 2025-12-08 ok
*.auone.jp 2 2025-11-13 2025-12-08 —
star-00.auone.jp 2 2025-07-01 2026-07-01 ok
cs-00.auone.jp 2 2025-10-08 2026-09-08 ok
cs1-01.auone.jp 2 2025-07-01 2026-07-01 ok
cs-01.auone.jp 2 2025-10-08 2026-09-08 ok
cs1.auone.jp 4 2025-09-01 2026-08-24 ok
asc.cs1.auone.jp 1 2025-11-18 2025-11-18 ok
asc-stg.cs1.auone.jp 3 2025-11-18 2026-08-11 ok
cs-02.auone.jp 2 2025-10-08 2026-09-08 ok
cs-03.auone.jp 1 2026-05-01 2026-05-01 ok
ideco3.auone.jp 2 2025-09-03 2025-11-05 ok
kidzania.edutainment-u15.auone.jp 1 2026-05-21 2026-05-21 ok
backend.edutainment-u15.auone.jp 2 2026-03-18 2026-08-18 ok
aeon.backend.edutainment-u15.auone.jp 1 2026-05-06 2026-05-06 ok
frontend.edutainment-u15.auone.jp 2 2026-03-18 2026-08-18 ok
kidzania.stg.edutainment-u15.auone.jp 3 2026-04-21 2026-09-21 ok
backend.stg.edutainment-u15.auone.jp 2 2026-03-18 2026-08-18 ok
aeon.backend.stg.edutainment-u15.auone.jp 1 2026-05-06 2026-05-06 ok
frontend.stg.edutainment-u15.auone.jp 2 2026-03-18 2026-08-18 ok
aeon.stg.edutainment-u15.auone.jp 2 2026-03-18 2026-08-18 ok
management.stg.edutainment-u15.auone.jp 2 2026-03-18 2026-08-18 ok
aeon.edutainment-u15.auone.jp 2 2026-03-18 2026-08-18 ok
management.edutainment-u15.auone.jp 3 2026-03-18 2026-08-18 ok
dev.edutainment-u15.auone.jp 1 2025-11-17 2025-11-17 ok
kidzania.dev.edutainment-u15.auone.jp 1 2026-02-05 2026-02-05 ok
backend.dev.edutainment-u15.auone.jp 2 2026-03-15 2026-08-15 ok
aeon.backend.dev.edutainment-u15.auone.jp 1 2026-05-06 2026-05-06 ok
aeon.test.backend.dev.edutainment-u15.auone.jp 2 2025-06-12 2026-05-13 ok
frontend.dev.edutainment-u15.auone.jp 2 2026-03-15 2026-08-15 ok
brain.dev.edutainment-u15.auone.jp 2 2026-03-09 2026-07-25 ok
aeon.dev.edutainment-u15.auone.jp 2 2026-03-15 2026-08-15 ok
management.dev.edutainment-u15.auone.jp 2 2026-03-10 2026-07-26 ok
aeon.test.dev.edutainment-u15.auone.jp 2 2025-06-12 2026-05-13 ok
a.auone.jp 1 2026-01-09 2026-01-09 ok
prd.asuca.auone.jp 3 2025-06-24 2026-05-25 ok
stg.asuca.auone.jp 3 2025-06-24 2026-05-25 ok
prd-osk-kagra-apigw.asuca.auone.jp 2 2025-09-12 2026-08-13 ok
stg-osk-kagra-apigw.asuca.auone.jp 2 2025-09-12 2026-08-13 ok
bc.auone.jp 1 2026-04-16 2026-04-16 nodata
*.bc.auone.jp 1 2026-04-16 2026-04-16 —
click-stg.bc.auone.jp 2 2025-10-03 2026-09-02 ok
open-stg.bc.auone.jp 2 2025-10-03 2026-09-02 ok
rt-stg.bc.auone.jp 1 2026-01-01 2026-01-01 ok
falcon.bc.auone.jp 1 2026-01-31 2026-01-31 nxdomain
*.falcon.bc.auone.jp 1 2026-01-31 2026-01-31 —
click-stg.falcon.bc.auone.jp 1 2026-02-02 2026-02-02 ok
open-stg.falcon.bc.auone.jp 1 2026-02-02 2026-02-02 ok
click-dev.falcon.bc.auone.jp 1 2026-01-30 2026-01-30 ok
*.click-dev.falcon.bc.auone.jp 1 2026-01-30 2026-01-30 —
open-dev.falcon.bc.auone.jp 1 2026-01-29 2026-01-29 ok
*.open-dev.falcon.bc.auone.jp 1 2026-01-29 2026-01-29 —
click-dev.bc.auone.jp 2 2025-08-28 2026-07-28 ok
open-dev.bc.auone.jp 2 2025-08-28 2026-07-28 ok
rt-dev.bc.auone.jp 1 2026-01-01 2026-01-01 ok
dc.auone.jp 5 2026-05-07 2026-05-07 ok
*.dc.auone.jp 4 2025-10-21 2026-09-21 —
*.ft-private.dc.auone.jp 4 2025-10-21 2026-09-21 —
*.private.dc.auone.jp 4 2025-10-21 2026-09-21 —
cs.dc.auone.jp 2 2026-05-07 2026-05-07 ok
ft.cs.dc.auone.jp 2 2026-05-07 2026-05-07 ok
ft.dc.auone.jp 4 2026-05-07 2026-05-07 ok
adc.auone.jp 1 2026-01-24 2026-01-24 ok
stg.adc.auone.jp 1 2025-12-26 2025-12-26 ok
logview.lismovideounlimited.auone.jp 4 2025-10-21 2026-09-26 ok
id.auone.jp 4 2025-10-13 2026-09-13 ok
test3.id.auone.jp 5 2025-10-13 2026-09-13 ok
dummy.test3.id.auone.jp 3 2025-10-15 2026-09-15 ok
proxy.test3.id.auone.jp 4 2025-10-13 2026-09-13 ok
st.id.auone.jp 5 2025-10-13 2026-09-13 ok
proxy.st.id.auone.jp 4 2025-10-13 2026-09-13 ok
test.id.auone.jp 4 2025-09-16 2026-08-17 ok
dev-k1-osk-kagra-apigw.test.id.auone.jp 2 2025-09-16 2026-08-17 ok
dev-k1-tky-kagra-apigw.test.id.auone.jp 2 2025-09-16 2026-08-17 ok
dummy.test.id.auone.jp 3 2025-10-15 2026-09-15 ok
proxy.test.id.auone.jp 4 2025-09-16 2026-08-17 ok
prd-osk-kagra-apigw.id.auone.jp 2 2025-10-13 2026-09-13 ok
prd-tky-kagra-apigw.id.auone.jp 2 2025-10-13 2026-09-13 ok
proxy.id.auone.jp 5 2025-10-13 2026-09-13 ok
image.rcmd.auone.jp 4 2025-09-24 2025-09-24 ok
reward.auone.jp 1 2025-11-17 2025-11-17 nodata
*.reward.auone.jp 1 2025-11-17 2025-11-17 —
stg.reward.auone.jp 2 2025-07-22 2026-07-08 nodata
*.stg.reward.auone.jp 2 2025-07-22 2026-07-08 —
test.reward.auone.jp 1 2025-11-17 2025-11-17 nodata
*.test.reward.auone.jp 1 2025-11-17 2025-11-17 —
brulee.auone.jp 1 2026-04-13 2026-04-13 ok
*.brulee.auone.jp 1 2026-04-13 2026-04-13 —
buffmee.auone.jp 5 2026-04-21 2026-09-24 nodata
*.buffmee.auone.jp 5 2026-04-21 2026-09-24 —
pre.buffmee.auone.jp 5 2026-04-20 2026-09-27 nodata
*.pre.buffmee.auone.jp 5 2026-04-20 2026-09-27 —
test.buffmee.auone.jp 5 2026-05-28 2026-09-14 nodata
*.test.buffmee.auone.jp 5 2026-05-28 2026-09-14 —
mcmc.k3.engage.auone.jp 1 2026-01-02 2026-01-02 ok
assets.mcmc.k3.engage.auone.jp 2 2026-03-22 2026-08-22 ok
pasc.k3.engage.auone.jp 2 2026-03-05 2026-07-21 ok
assets.pasc.k3.engage.auone.jp 2 2026-03-11 2026-07-27 ok
live-blue.k3.engage.auone.jp 2 2025-07-08 2026-06-06 ok
live.k3.engage.auone.jp 2 2025-07-08 2026-06-06 ok

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/auone.jp.

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/auone.jp.