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.

43 hosts · 340 ms

HostCertsFirst seenLast seenDNS
aisc.org 15 2026-03-23 2026-09-08 ok
*.aisc.org 15 2026-03-23 2026-09-08 —
nascc.aisc.org 3 2026-06-03 2026-08-12 ok
www.nascc.aisc.org 3 2026-06-03 2026-08-12 ok
cloud.aisc.org 1 2025-12-22 2025-12-22 ok
learning.aisc.org 5 2026-05-19 2026-09-16 ok
ej.aisc.org 7 2026-05-30 2026-09-29 ok
clark.aisc.org 2 2026-01-14 2026-07-09 ok
pro-311.clark.aisc.org 1 2026-08-19 2026-08-19 ok
api.pro-311.clark.aisc.org 1 2026-08-19 2026-08-19 ok
stream.api.pro-311.clark.aisc.org 2 2026-08-19 2026-08-19 nxdomain
assets.pro-311.clark.aisc.org 1 2026-08-19 2026-08-19 ok
pro-1024.clark.aisc.org 2 2026-09-14 2026-09-14 ok
api.pro-1024.clark.aisc.org 2 2026-09-14 2026-09-14 ok
stream.api.pro-1024.clark.aisc.org 2 2026-09-14 2026-09-14 ok
assets.pro-1024.clark.aisc.org 2 2026-09-14 2026-09-14 nodata
pro-857.clark.aisc.org 2 2026-08-21 2026-08-21 ok
api.pro-857.clark.aisc.org 2 2026-08-21 2026-08-21 ok
stream.api.pro-857.clark.aisc.org 2 2026-08-21 2026-08-21 ok
assets.pro-857.clark.aisc.org 2 2026-08-21 2026-08-21 ok
beta.clark.aisc.org 1 2026-08-18 2026-08-18 ok
api.beta.clark.aisc.org 2 2026-08-18 2026-08-18 ok
stream.api.beta.clark.aisc.org 2 2026-08-18 2026-08-18 ok
assets.beta.clark.aisc.org 1 2026-08-18 2026-08-18 ok
api.clark.aisc.org 3 2026-03-23 2026-08-23 ok
stream.api.clark.aisc.org 1 2026-05-06 2026-05-06 ok
login.api.clark.aisc.org 7 2026-03-23 2026-08-27 ok
api.qa.basecamp.clark.aisc.org 2 2026-08-21 2026-08-31 ok
stream.api.qa.basecamp.clark.aisc.org 2 2026-08-21 2026-08-31 ok
assets.qa.basecamp.clark.aisc.org 2 2026-08-21 2026-08-31 ok
api.prod.basecamp.clark.aisc.org 1 2026-08-17 2026-08-17 ok
stream.api.prod.basecamp.clark.aisc.org 1 2026-08-17 2026-08-17 ok
api.dev.basecamp.clark.aisc.org 3 2026-08-20 2026-08-27 ok
stream.api.dev.basecamp.clark.aisc.org 3 2026-08-20 2026-08-27 ok
assets.clark.aisc.org 2 2026-03-23 2026-08-23 ok
email.aisc.org 5 2026-04-27 2026-08-25 ok
educatorforum.aisc.org 10 2026-05-01 2026-09-13 ok
go.aisc.org 3 2026-06-04 2026-08-05 ok
linus.aisc.org 2 2025-08-17 2026-07-16 ok
ibuiltthat.aisc.org 5 2026-05-12 2026-09-28 ok
www.ibuiltthat.aisc.org 5 2026-05-12 2026-09-28 ok
account.aisc.org 15 2026-05-01 2026-09-01 ok
www.aisc.org 10 2026-05-07 2026-09-02 ok

Programmatic access, with DNS A records: API GET /v1/hosts/aisc.org (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/aisc.org.