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.

94 hosts · 265 ms

HostCertsFirst seenLast seen
yubico.com 6 2025-07-06 2026-10-07
*.eu1.yubico.com 1 2026-08-26 2026-08-26
api2.yubico.com 2 2026-04-09 2026-09-09
*.us2.yubico.com 4 2026-05-02 2026-08-18
api-gw.yubicloud-r53.yubico.com 9 2026-03-13 2026-08-15
api3.yubico.com 2 2026-04-09 2026-09-09
api4.yubico.com 2 2026-04-09 2026-09-09
api5.yubico.com 2 2026-04-09 2026-09-09
api6.yubico.com 2 2026-04-09 2026-09-09
media.yubico.com 5 2026-05-18 2026-09-12
static.yubico.com 5 2026-04-25 2026-10-03
upload.yubico.com 3 2026-05-28 2026-09-15
opensource.yubico.com 6 2026-04-17 2026-09-26
upgrade.yubico.com 3 2026-05-26 2026-09-07
*.stage.yubico.com 5 2026-04-22 2026-09-27
*.eu1.stage.yubico.com 1 2026-08-24 2026-08-24
*.us2.stage.yubico.com 6 2026-06-03 2026-09-15
media.stage.yubico.com 3 2026-05-28 2026-09-16
api.console.stage.yubico.com 5 2026-04-30 2026-10-04
ecom.login.stage.yubico.com 2 2026-07-10 2026-09-03
*.k8s.stage.yubico.com 5 2026-04-18 2026-09-30
genuine-website.k8s.stage.yubico.com 4 2026-05-01 2026-10-07
*.eu.stage.yubico.com 1 2026-08-24 2026-08-24
fastly-www.stage.yubico.com 5 2026-04-26 2026-08-24
console.yubico.com 4 2026-05-03 2026-10-06
api.console.yubico.com 4 2026-05-08 2026-10-07
store.yubico.com 3 2026-05-16 2026-09-04
enterprise.yubico.com 6 2025-08-21 2026-08-12
blog.yubico.com 3 2026-05-08 2026-08-25
wiki.yubico.com 6 2026-04-17 2026-09-26
bimi.yubico.com 4 2026-04-15 2026-09-28
api.yubico.com 2 2026-04-09 2026-09-09
gsnlink.yubico.com 1 2025-12-30 2025-12-30
wwyk.yubico.com 9 2025-07-06 2026-10-07
portal.yubico.com 3 2026-04-27 2026-08-15
enduserportal.yubico.com 3 2026-05-01 2026-06-22
devprogram.yubico.com 4 2026-04-28 2026-10-05
sgtm.yubico.com 6 2026-04-21 2026-09-30
preview-server.sgtm.yubico.com 5 2026-04-26 2026-10-06
forum.yubico.com 4 2025-07-06 2026-09-23
login.yubico.com 3 2026-05-02 2026-08-20
ecom.login.yubico.com 3 2026-07-22 2026-09-13
yubination.yubico.com 7 2026-05-19 2026-09-12
community.yubination.yubico.com 3 2026-05-07 2026-08-21
authentination.yubico.com 5 2026-05-13 2026-09-07
go.yubico.com 20 2026-04-28 2026-08-25
demo.yubico.com 6 2025-07-06 2026-10-07
acme.demo.yubico.com 6 2026-02-10 2026-09-24
brandfolder.yubico.com 3 2026-05-25 2026-09-08
developer.yubico.com 4 2026-05-30 2026-09-18
email.pr.yubico.com 5 2025-07-06 2026-09-25
*.k8s.yubico.com 6 2026-04-21 2026-10-05
docs.yubico.com 4 2025-07-06 2026-09-08
downloads.yubico.com 5 2025-07-06 2026-09-24
resources.yubico.com 1 2025-12-09 2025-12-09
pages.yubico.com 22 2026-04-27 2026-08-23
partners.yubico.com 3 2026-05-11 2026-08-29
developers.yubico.com 3 2025-07-06 2026-09-02
investors.yubico.com 22 2026-04-23 2026-09-29
mta-sts.yubico.com 5 2026-04-16 2026-09-28
status.yubico.com 5 2026-05-28 2026-09-24
*.preflight.yubico.com 3 2026-05-17 2026-09-05
*.eu1.preflight.yubico.com 3 2026-05-24 2026-08-19
*.us2.preflight.yubico.com 3 2026-05-15 2026-08-28
*.k8s.preflight.yubico.com 3 2026-05-16 2026-10-03
console.yedaudit.yubico.com 4 2026-05-27 2026-09-13
api.console.yedaudit.yubico.com 3 2026-05-24 2026-09-11
portal.yedaudit.yubico.com 3 2026-04-29 2026-08-18
enduserportal.yedaudit.yubico.com 2 2026-05-24 2026-07-16
login.yedaudit.yubico.com 3 2026-05-27 2026-09-13
*.k8s.yedaudit.yubico.com 3 2026-05-23 2026-09-07
enrollment.yedaudit.yubico.com 3 2026-05-09 2026-08-26
enrollment.yubico.com 5 2026-05-28 2026-09-13
start.yubico.com 3 2026-04-27 2026-08-15
application-bugreport.yubico.com 5 2026-04-26 2026-10-03
support.yubico.com 4 2025-08-21 2026-08-05
trust.yubico.com 5 2025-06-16 2026-08-28
*.eu.yubico.com 1 2026-08-26 2026-08-26
dev.yubico.com 6 2026-05-28 2026-09-24
*.dev.yubico.com 4 2026-04-22 2026-10-03
*.eu1.dev.yubico.com 1 2026-08-21 2026-08-21
*.us2.dev.yubico.com 3 2026-05-27 2026-09-09
*.yed-ephemeral.us2.dev.yubico.com 6 2026-06-02 2026-09-18
hsts-preload.dev.yubico.com 3 2026-04-30 2026-08-17
www.hsts-preload.dev.yubico.com 3 2026-04-30 2026-08-17
api.console.dev.yubico.com 5 2026-05-08 2026-09-23
*.ecom.dev.yubico.com 3 2026-05-11 2026-08-26
*.ecom.login.dev.yubico.com 3 2026-05-11 2026-08-27
*.k8s.dev.yubico.com 4 2026-04-19 2026-09-28
*.yed-ephemeral.k8s.dev.yubico.com 5 2026-04-26 2026-10-04
*.eu.dev.yubico.com 1 2026-08-24 2026-08-24
www.yubico.com 6 2025-07-06 2026-10-07
openpgpkey.yubico.com 6 2026-04-19 2026-10-02
my.yubico.com 3 2026-05-29 2026-09-14

Programmatic access: API GET /v1/hosts/yubico.com (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/yubico.com.