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.

70 hosts · 367 ms

HostCertsFirst seenLast seenDNS
flatfox.ch 48 2026-04-13 2026-09-29 ok
*.flatfox.ch 34 2026-04-19 2026-09-29 —
test10.flatfox.ch 5 2026-06-02 2026-09-30 ok
test01.flatfox.ch 5 2026-05-04 2026-09-01 ok
test11.flatfox.ch 6 2026-06-01 2026-09-29 ok
monifox-2.flatfox.ch 3 2026-04-20 2026-06-19 ok
test02.flatfox.ch 5 2026-05-04 2026-09-01 ok
test12.flatfox.ch 5 2026-06-01 2026-09-29 ok
*.stage2.flatfox.ch 20 2026-04-19 2026-09-27 —
p-epdv4ha7p2.flatfox.ch 14 2026-04-13 2026-09-28 ok
www2.flatfox.ch 2 2026-02-19 2026-07-07 ok
*.www2.flatfox.ch 2 2026-02-19 2026-07-07 —
test03.flatfox.ch 5 2026-05-05 2026-09-02 ok
test13.flatfox.ch 5 2026-06-02 2026-09-30 ok
*.stage3.flatfox.ch 20 2026-04-19 2026-09-27 —
p-tw3b437ti3.flatfox.ch 14 2026-04-13 2026-09-28 ok
test04.flatfox.ch 5 2026-05-04 2026-09-01 ok
test14.flatfox.ch 5 2026-06-03 2026-10-01 ok
*.stage4.flatfox.ch 20 2026-04-19 2026-09-27 —
p-btd3yifqh4.flatfox.ch 14 2026-04-13 2026-09-28 ok
test05.flatfox.ch 5 2026-05-04 2026-09-01 ok
test15.flatfox.ch 5 2026-06-02 2026-09-30 ok
*.stage5.flatfox.ch 20 2026-04-19 2026-09-27 —
test06.flatfox.ch 4 2026-06-07 2026-10-05 ok
test16.flatfox.ch 5 2026-06-02 2026-09-30 ok
p-74mc96uv36.flatfox.ch 14 2026-04-13 2026-09-28 ok
test17.flatfox.ch 5 2026-05-28 2026-09-25 ok
*.test17.flatfox.ch 22 2026-04-19 2026-08-15 —
p-6nn7xr9pd9.test17.flatfox.ch 5 2026-05-28 2026-09-25 ok
test08.flatfox.ch 5 2026-05-20 2026-09-17 ok
test18.flatfox.ch 5 2026-05-11 2026-09-08 ok
test09.flatfox.ch 5 2026-06-02 2026-09-30 ok
test19.flatfox.ch 5 2026-06-02 2026-09-30 ok
p-6gt44tjne9.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-mqmegfxkde.flatfox.ch 14 2026-04-13 2026-09-28 ok
stage.flatfox.ch 15 2026-04-26 2026-09-08 ok
*.stage.flatfox.ch 20 2026-04-19 2026-09-27 —
www2.stage.flatfox.ch 2 2026-04-02 2026-09-02 ok
*.www2.stage.flatfox.ch 2 2026-04-02 2026-09-02 —
www.stage.flatfox.ch 15 2026-04-26 2026-09-08 ok
*.mail.priority.stage.flatfox.ch 4 2026-08-12 2026-08-20 —
p-k4qhk57guy.stage.flatfox.ch 15 2026-04-26 2026-09-08 ok
unavailable.flatfox.ch 6 2026-04-18 2026-08-14 ok
p-7x8m5mjemf.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-nfyarjzsmf.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-adt3upxbyf.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-snhffghkdg.flatfox.ch 14 2026-04-13 2026-09-28 ok
monifox-graph.flatfox.ch 4 2026-04-28 2026-06-27 ok
p-ensiuz2zni.flatfox.ch 14 2026-04-13 2026-09-28 ok
api.flatfox.ch 3 2026-05-05 2026-08-25 ok
p-5uztvxug6n.flatfox.ch 14 2026-04-13 2026-09-28 ok
cdn.flatfox.ch 15 2026-04-24 2026-10-05 ok
*.cdn.flatfox.ch 15 2026-04-24 2026-10-05 —
p-nxwxx8zken.flatfox.ch 14 2026-04-13 2026-09-28 ok
sstapp.flatfox.ch 3 2026-05-23 2026-09-06 ok
p-xhghb2i3wq.flatfox.ch 14 2026-04-13 2026-09-28 ok
cms.flatfox.ch 5 2026-05-24 2026-09-21 ok
p-sgfncxkrit.flatfox.ch 14 2026-04-13 2026-09-28 ok
apitest.flatfox.ch 3 2026-05-05 2026-08-25 ok
sst.flatfox.ch 3 2026-05-23 2026-09-06 ok
p-zqjw5y48ku.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-fwpzdajwbv.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-dgmqd7zuyv.flatfox.ch 14 2026-04-13 2026-09-28 ok
www.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-8wrbtunhyw.flatfox.ch 14 2026-04-13 2026-09-28 ok
p-anp8x5h2jx.flatfox.ch 14 2026-04-13 2026-09-28 ok
monifox.flatfox.ch 5 2026-05-31 2026-09-28 ok
p-g4mdsamwqx.flatfox.ch 14 2026-04-13 2026-09-28 ok
registry.flatfox.ch 5 2026-05-30 2026-09-28 ok
*.mail.priority.flatfox.ch 4 2026-08-12 2026-08-20 —

Programmatic access, with DNS A records: API GET /v1/hosts/flatfox.ch (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/flatfox.ch.