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.

100 hosts (first page) · 199 ms

HostCertsFirst seenLast seen
sakura.ad.jp 1 2026-02-16 2026-02-16
pop10.sakura.ad.jp 5 2026-04-22 2026-08-26
pop20.sakura.ad.jp 5 2026-04-22 2026-08-26
tkd-svdly-cloud01.sakura.ad.jp 6 2026-05-20 2026-09-17
pop11.sakura.ad.jp 5 2026-04-22 2026-08-26
report-isk1.sakura.ad.jp 3 2026-08-17 2026-08-17
service-status1.sakura.ad.jp 3 2026-07-28 2026-09-21
tkd-svdly-cloud02.sakura.ad.jp 5 2026-05-20 2026-09-17
nwop-srv02.sakura.ad.jp 1 2026-09-28 2026-09-28
pop12.sakura.ad.jp 5 2026-04-29 2026-09-02
dev-tagami2.sakura.ad.jp 285 2026-04-13 2026-10-09
report-isk2.sakura.ad.jp 4 2026-06-16 2026-08-17
unyo2.sakura.ad.jp 5 2026-05-20 2026-09-23
report2.sakura.ad.jp 2 2026-08-17 2026-08-17
manual-staging-v2.sakura.ad.jp 7 2026-04-22 2026-09-06
manual-v2.sakura.ad.jp 7 2026-04-22 2026-09-07
tkd-svdly-cloud03.sakura.ad.jp 5 2026-05-20 2026-09-17
pop13.sakura.ad.jp 5 2026-04-22 2026-08-26
report-isk3.sakura.ad.jp 2 2026-08-17 2026-08-17
report3.sakura.ad.jp 2 2026-08-17 2026-08-17
tkd-svdly-cloud04.sakura.ad.jp 5 2026-05-19 2026-09-17
pop14.sakura.ad.jp 5 2026-04-22 2026-08-26
report-isk4.sakura.ad.jp 4 2026-06-16 2026-08-17
tkd-svdly-cloud05.sakura.ad.jp 6 2026-05-20 2026-09-17
pop05.sakura.ad.jp 5 2026-04-22 2026-08-26
pop15.sakura.ad.jp 5 2026-04-22 2026-08-26
pop06.sakura.ad.jp 5 2026-04-22 2026-08-26
pop16.sakura.ad.jp 5 2026-04-22 2026-08-26
pop07.sakura.ad.jp 5 2026-04-22 2026-08-26
pop17.sakura.ad.jp 5 2026-04-22 2026-08-26
archive.janog57.sakura.ad.jp 6 2026-05-04 2026-09-01
live.janog57.sakura.ad.jp 5 2026-05-20 2026-09-07
sponser-booth.janog57.sakura.ad.jp 5 2026-05-09 2026-08-27
register.janog57.sakura.ad.jp 5 2026-05-10 2026-08-28
ai-chat.janog57.sakura.ad.jp 4 2026-04-17 2026-08-15
pop08.sakura.ad.jp 5 2026-04-22 2026-08-26
pop18.sakura.ad.jp 5 2026-04-22 2026-08-26
register.janog58.sakura.ad.jp 4 2026-06-04 2026-07-29
sponsors.janog58.sakura.ad.jp 5 2026-04-30 2026-08-18
pop09.sakura.ad.jp 5 2026-04-22 2026-08-26
pop19.sakura.ad.jp 5 2026-04-22 2026-08-26
register.janog59.sakura.ad.jp 1 2026-10-02 2026-10-02
sponsors.janog59.sakura.ad.jp 1 2026-08-24 2026-08-24
sakumaga.sakura.ad.jp 2 2026-03-06 2026-08-17
stage.sakumaga.sakura.ad.jp 2 2026-03-06 2026-08-17
www.stage.sakumaga.sakura.ad.jp 2 2026-03-06 2026-08-17
www.sakumaga.sakura.ad.jp 2 2026-03-06 2026-08-17
webui-auth01.cloud.alpha.sakura.ad.jp 1 2026-09-25 2026-09-25
dev-webui-auth01.cloud.alpha.sakura.ad.jp 3 2026-07-30 2026-09-28
webui-auth02.cloud.alpha.sakura.ad.jp 1 2026-09-29 2026-09-29
dev-webui-auth02.cloud.alpha.sakura.ad.jp 1 2026-09-16 2026-09-16
grafana.cloud.alpha.sakura.ad.jp 5 2026-05-21 2026-09-17
dev-grafana.cloud.alpha.sakura.ad.jp 5 2026-05-14 2026-09-11
webui-auth.cloud.alpha.sakura.ad.jp 2 2026-09-25 2026-09-29
dev-webui-auth.cloud.alpha.sakura.ad.jp 4 2026-07-30 2026-09-28
*.dev-webui-auth.cloud.alpha.sakura.ad.jp 4 2026-07-30 2026-09-28
*.webui-auth.cloud.alpha.sakura.ad.jp 2 2026-09-25 2026-09-29
iam-api.cloud.alpha.sakura.ad.jp 5 2026-05-16 2026-09-13
develop-iam-api.cloud.alpha.sakura.ad.jp 5 2026-05-17 2026-09-14
system-activity-ui.cloud.alpha.sakura.ad.jp 39 2026-04-15 2026-10-07
dev-system-activity-ui.cloud.alpha.sakura.ad.jp 39 2026-04-15 2026-10-07
edgertmgr.cloud.alpha.sakura.ad.jp 21 2026-04-30 2026-09-30
dev-edgertmgr.cloud.alpha.sakura.ad.jp 22 2026-04-30 2026-09-30
ope-jenkins.cloud.alpha.sakura.ad.jp 10 2026-04-30 2026-09-30
netbox.cloud.alpha.sakura.ad.jp 7 2026-04-30 2026-08-31
dev-netbox.cloud.alpha.sakura.ad.jp 7 2026-04-30 2026-09-30
redmine.alpha.sakura.ad.jp 5 2026-05-26 2026-09-21
glovia.sakura.ad.jp 5 2026-05-26 2026-09-23
tanaka.sakura.ad.jp 5 2026-05-06 2026-09-03
dot-sakura.sakura.ad.jp 1 2025-12-05 2025-12-05
www.dot-sakura.sakura.ad.jp 1 2025-12-05 2025-12-05
sa.sakura.ad.jp 1 2026-08-25 2026-08-25
headscale.sa.sakura.ad.jp 1 2026-08-25 2026-08-25
derp-tk1b.global.sa.sakura.ad.jp 2 2026-08-25 2026-09-05
derp-is1b.global.sa.sakura.ad.jp 2 2026-08-25 2026-09-05
diana.data.sakura.ad.jp 5 2026-05-02 2026-09-06
openmetadata.data.sakura.ad.jp 3 2026-07-08 2026-09-06
cloud-business-dashboard.data.sakura.ad.jp 5 2026-05-06 2026-09-06
optout-remover.data.sakura.ad.jp 5 2026-05-23 2026-09-20
iris.data.sakura.ad.jp 4 2026-04-20 2026-08-17
airflow.data.sakura.ad.jp 5 2026-06-04 2026-10-02
sakura-bridge-registry.data.sakura.ad.jp 10 2026-05-10 2026-09-15
codimd.yorozuya.sakura.ad.jp 6 2026-05-08 2026-10-07
elab.sakura.ad.jp 5 2026-05-25 2026-09-12
api.misaka.elab.sakura.ad.jp 5 2026-05-02 2026-08-20
github.elab.sakura.ad.jp 5 2026-04-25 2026-08-23
doc.elab.sakura.ad.jp 4 2026-04-21 2026-08-19
oldtimecard.elab.sakura.ad.jp 5 2026-05-01 2026-08-29
api.tk1a.maintenance.elab.sakura.ad.jp 4 2026-05-03 2026-06-27
editor.tk1a.maintenance.elab.sakura.ad.jp 4 2026-05-02 2026-06-26
network-measure.elab.sakura.ad.jp 5 2026-05-28 2026-09-15
grafana.network-measure.elab.sakura.ad.jp 5 2026-05-29 2026-09-16
public.network-measure.elab.sakura.ad.jp 5 2026-04-28 2026-08-16
config.network-measure.elab.sakura.ad.jp 5 2026-05-28 2026-09-15
develop.network-measure.elab.sakura.ad.jp 5 2026-05-28 2026-09-15
grafana.develop.network-measure.elab.sakura.ad.jp 5 2026-05-28 2026-09-15
config.develop.network-measure.elab.sakura.ad.jp 5 2026-05-28 2026-09-15
collector.develop.network-measure.elab.sakura.ad.jp 5 2026-05-28 2026-09-15
collector.network-measure.elab.sakura.ad.jp 5 2026-05-29 2026-09-16
cloudcam-staging.elab.sakura.ad.jp 5 2026-04-17 2026-09-29

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/sakura.ad.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/sakura.ad.jp.