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.

33 hosts · 355 ms

HostCertsFirst seenLast seenDNS
onlinecoursesaustralia.edu.au 57 2026-05-09 2026-09-15 ok
*.onlinecoursesaustralia.edu.au 39 2025-09-19 2026-09-12 —
0y1jlrrvglz4mwtj459vk4t6fw0f5287.onlinecoursesaustralia.edu.au 10 2026-05-17 2026-09-12 ok
moodle.onlinecoursesaustralia.edu.au 8 2026-05-17 2026-09-12 ok
smallbusinessonline.onlinecoursesaustralia.edu.au 6 2026-05-17 2026-09-12 ok
staging.onlinecoursesaustralia.edu.au 2 2026-09-28 2026-09-28 ok
streaming.onlinecoursesaustralia.edu.au 6 2026-09-22 2026-09-28 ok
mentalhealth.onlinecoursesaustralia.edu.au 12 2026-05-17 2026-09-13 ok
portal.onlinecoursesaustralia.edu.au 10 2026-05-17 2026-09-12 ok
umbracoemail.onlinecoursesaustralia.edu.au 20 2026-05-15 2026-09-12 ok
smallbusinessonlineadmin.onlinecoursesaustralia.edu.au 8 2026-05-17 2026-09-12 ok
learn.onlinecoursesaustralia.edu.au 13 2026-03-11 2026-09-13 ok
freeinfo.onlinecoursesaustralia.edu.au 3 2026-06-23 2026-08-24 ok
hello.onlinecoursesaustralia.edu.au 9 2026-04-19 2026-09-16 ok
lp.onlinecoursesaustralia.edu.au 8 2026-05-17 2026-09-12 ok
autodiscover.onlinecoursesaustralia.edu.au 6 2026-05-17 2026-09-12 ok
services.onlinecoursesaustralia.edu.au 2 2026-09-28 2026-09-28 ok
sst.services.onlinecoursesaustralia.edu.au 1 2026-09-28 2026-09-28 nxdomain
load.sst.services.onlinecoursesaustralia.edu.au 2 2026-09-28 2026-09-28 ok
itbpriorities.onlinecoursesaustralia.edu.au 14 2026-05-21 2026-09-16 ok
comms.onlinecoursesaustralia.edu.au 8 2026-05-17 2026-09-12 ok
*.comms.onlinecoursesaustralia.edu.au 8 2026-05-13 2026-09-08 —
cloud.comms.onlinecoursesaustralia.edu.au 16 2025-09-22 2026-09-12 ok
image.comms.onlinecoursesaustralia.edu.au 10 2025-06-25 2026-09-30 ok
click.comms.onlinecoursesaustralia.edu.au 10 2025-09-27 2026-07-27 ok
view.comms.onlinecoursesaustralia.edu.au 7 2025-06-22 2026-07-15 ok
umbracoerrors.onlinecoursesaustralia.edu.au 20 2026-05-17 2026-09-15 ok
student.onlinecoursesaustralia.edu.au 6 2026-05-17 2026-09-12 ok
leadmanagement.onlinecoursesaustralia.edu.au 2 2026-05-17 2026-05-17 ok
fast.onlinecoursesaustralia.edu.au 18 2026-04-23 2026-09-12 ok
sst.onlinecoursesaustralia.edu.au 1 2026-09-28 2026-09-28 ok
load.sst.onlinecoursesaustralia.edu.au 2 2026-09-28 2026-09-28 ok
www.onlinecoursesaustralia.edu.au 10 2026-05-17 2026-09-12 ok

Programmatic access, with DNS A records: API GET /v1/hosts/onlinecoursesaustralia.edu.au (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/onlinecoursesaustralia.edu.au.