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) · 259 ms

HostCertsFirst seenLast seen
nothing.tech 459 2025-07-15 2026-10-06
*.nothing.tech 21 2025-07-15 2026-10-06
whatsnew-phone1.nothing.tech 5 2026-05-17 2026-09-24
playground-test1.nothing.tech 10 2026-05-24 2026-09-19
api-playground-test1.nothing.tech 8 2026-05-28 2026-09-23
admin-playground-test1.nothing.tech 10 2026-05-24 2026-09-19
preview-playground-test1.nothing.tech 10 2026-05-24 2026-09-19
n-test1.nothing.tech 6 2026-05-12 2026-09-16
admin-n-test1.nothing.tech 6 2026-05-12 2026-09-16
*.admin-n-test1.nothing.tech 6 2026-05-12 2026-09-16
*.n-test1.nothing.tech 6 2026-05-12 2026-09-16
n-cn-test1.nothing.tech 2 2026-06-18 2026-06-18
admin-n-cn-test1.nothing.tech 4 2026-06-18 2026-09-08
*.admin-n-cn-test1.nothing.tech 4 2026-06-18 2026-09-08
*.n-cn-test1.nothing.tech 2 2026-06-18 2026-06-18
napkin-test1.nothing.tech 2 2026-05-12 2026-05-12
api-napkin-test1.nothing.tech 4 2026-04-14 2026-05-12
*.api-napkin-test1.nothing.tech 4 2026-04-14 2026-05-12
admin-napkin-test1.nothing.tech 2 2026-05-12 2026-05-12
*.admin-napkin-test1.nothing.tech 2 2026-05-12 2026-05-12
*.napkin-test1.nothing.tech 2 2026-05-12 2026-05-12
n-baidu-test1.nothing.tech 2 2026-06-18 2026-06-18
admin-n-baidu-test1.nothing.tech 2 2026-06-18 2026-06-18
*.admin-n-baidu-test1.nothing.tech 2 2026-06-18 2026-06-18
*.n-baidu-test1.nothing.tech 2 2026-06-18 2026-06-18
whatsnew-phone2.nothing.tech 5 2026-05-17 2026-09-24
nv2-test2.nothing.tech 2 2026-06-08 2026-06-08
*.nv2-test2.nothing.tech 2 2026-06-08 2026-06-08
playground-test2.nothing.tech 22 2026-05-24 2026-10-01
api-playground-test2.nothing.tech 20 2026-05-28 2026-10-01
admin-playground-test2.nothing.tech 23 2026-05-24 2026-10-01
preview-playground-test2.nothing.tech 22 2026-05-24 2026-10-01
note-share-test2.nothing.tech 6 2026-08-04 2026-10-02
*.note-share-test2.nothing.tech 6 2026-08-04 2026-10-02
n-test2.nothing.tech 14 2026-05-12 2026-08-25
api-n-test2.nothing.tech 4 2026-05-12 2026-05-15
*.api-n-test2.nothing.tech 4 2026-05-12 2026-05-15
admin-n-test2.nothing.tech 10 2026-05-12 2026-09-25
*.admin-n-test2.nothing.tech 10 2026-05-12 2026-09-25
*.n-test2.nothing.tech 14 2026-05-12 2026-08-25
playground-test3.nothing.tech 10 2026-05-24 2026-09-19
api-playground-test3.nothing.tech 8 2026-05-28 2026-09-23
admin-playground-test3.nothing.tech 10 2026-05-24 2026-09-19
preview-playground-test3.nothing.tech 10 2026-05-24 2026-09-19
n-test3.nothing.tech 2 2026-06-05 2026-06-05
admin-n-test3.nothing.tech 2 2026-06-05 2026-06-05
*.admin-n-test3.nothing.tech 2 2026-06-05 2026-06-05
*.n-test3.nothing.tech 2 2026-06-05 2026-06-05
playground-test4.nothing.tech 10 2026-05-24 2026-09-19
api-playground-test4.nothing.tech 8 2026-05-28 2026-09-23
admin-playground-test4.nothing.tech 10 2026-05-24 2026-09-19
preview-playground-test4.nothing.tech 10 2026-05-24 2026-09-19
playground-test5.nothing.tech 12 2026-06-10 2026-10-06
api-playground-test5.nothing.tech 10 2026-06-10 2026-10-06
admin-playground-test5.nothing.tech 12 2026-06-10 2026-10-06
preview-playground-test5.nothing.tech 10 2026-06-10 2026-10-06
checkout-ca.nothing.tech 15 2026-04-23 2026-10-04
qa.nothing.tech 14 2026-04-14 2026-09-25
sa.nothing.tech 15 2026-05-22 2026-10-01
essential-apps-beta.nothing.tech 2 2026-08-06 2026-10-07
beta-ota.nothing.tech 2 2025-08-11 2026-07-12
c.nothing.tech 6 2026-05-20 2026-09-16
id.nothing.tech 13 2026-05-29 2026-10-08
playground.nothing.tech 3 2026-01-19 2026-01-28
preview1-playground.nothing.tech 1 2026-01-28 2026-01-28
preview2-playground.nothing.tech 1 2026-01-28 2026-01-28
be-playground.nothing.tech 2 2026-01-28 2026-01-28
stage-playground.nothing.tech 1 2026-01-28 2026-01-28
staging-playground.nothing.tech 1 2026-01-20 2026-01-20
admin-playground.nothing.tech 1 2026-01-23 2026-01-23
contest-playground.nothing.tech 1 2026-02-10 2026-02-10
dev-playground.nothing.tech 1 2026-01-08 2026-01-08
trk.e.nothing.tech 8 2026-05-02 2026-08-28
ae.nothing.tech 13 2026-05-23 2026-10-02
be.nothing.tech 13 2026-04-13 2026-10-09
service.nothing.tech 2 2026-04-28 2026-09-28
*.service.nothing.tech 2 2026-04-28 2026-09-28
de.nothing.tech 16 2026-05-23 2026-09-30
checkout-de.nothing.tech 14 2026-04-21 2026-10-04
ee.nothing.tech 15 2026-04-13 2026-09-24
ie.nothing.tech 15 2026-05-30 2026-10-07
note-share.nothing.tech 6 2026-08-04 2026-10-02
*.note-share.nothing.tech 6 2026-08-04 2026-10-02
playground-pre.nothing.tech 13 2026-06-05 2026-10-01
api-playground-pre.nothing.tech 13 2026-06-05 2026-10-01
admin-playground-pre.nothing.tech 12 2026-06-05 2026-10-01
preview-playground-pre.nothing.tech 6 2026-06-05 2026-10-01
n-pre.nothing.tech 6 2026-05-15 2026-08-27
api-n-pre.nothing.tech 4 2026-05-15 2026-05-15
*.api-n-pre.nothing.tech 4 2026-05-15 2026-05-15
admin-n-pre.nothing.tech 6 2026-05-15 2026-08-27
*.admin-n-pre.nothing.tech 6 2026-05-15 2026-08-27
*.n-pre.nothing.tech 6 2026-05-15 2026-08-27
se.nothing.tech 15 2026-05-22 2026-10-01
checkout-se.nothing.tech 12 2026-04-22 2026-10-04
bg.nothing.tech 14 2026-04-14 2026-09-26
staging.nothing.tech 5 2026-05-18 2026-09-15
training.nothing.tech 14 2026-04-17 2026-08-13
sg.nothing.tech 17 2026-05-23 2026-10-02
api-napkin-sg.nothing.tech 2 2026-08-19 2026-08-19

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/nothing.tech.

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/nothing.tech.