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.

37 hosts · 283 ms

HostCertsFirst seenLast seenDNS
o9solutions.com 15 2026-04-13 2026-09-16 ok
*.o9solutions.com 2 2026-04-13 2026-08-28 —
o9testportal12345.o9solutions.com 4 2026-06-17 2026-08-15 ok
pga.o9solutions.com 5 2026-05-16 2026-09-16 ok
soc.o9solutions.com 4 2026-04-12 2026-08-22 ok
frontend.o9solutions.com 5 2026-05-31 2026-10-03 ok
gw-cbe.o9solutions.com 2 2025-09-25 2025-12-29 ok
www.gw-cbe.o9solutions.com 2 2025-09-25 2025-12-29 nxdomain
marketknowledge.o9solutions.com 3 2026-02-18 2026-10-02 ok
*.fastretailing.o9solutions.com 1 2025-09-22 2025-09-22 —
merch.o9solutions.com 5 2026-05-10 2026-09-08 ok
videoask.o9solutions.com 5 2026-05-20 2026-09-17 ok
trial.o9solutions.com 1 2025-12-14 2025-12-14 ok
*.trial.o9solutions.com 1 2025-12-14 2025-12-14 —
team.o9solutions.com 5 2026-05-10 2026-09-08 ok
platform.o9solutions.com 2 2026-04-13 2026-08-28 ok
go.o9solutions.com 12 2026-04-24 2026-08-20 ok
arvo.o9solutions.com 1 2026-06-26 2026-06-26 ok
gw-blr.o9solutions.com 4 2026-04-13 2026-09-24 ok
www.gw-blr.o9solutions.com 4 2026-04-13 2026-09-24 nodata
communities.o9solutions.com 1 2026-08-25 2026-08-25 ok
cms.o9solutions.com 5 2026-05-10 2026-09-07 ok
knowledge-cms.o9solutions.com 5 2026-04-27 2026-08-25 ok
lms.o9solutions.com 4 2026-04-14 2026-08-15 ok
content.lms.o9solutions.com 11 2026-04-14 2026-08-12 ok
*.content.lms.o9solutions.com 8 2026-04-16 2026-08-12 —
demos.o9solutions.com 13 2026-04-27 2026-08-15 ok
partners.o9solutions.com 5 2026-05-10 2026-09-07 ok
o9useraigw-direct.o9solutions.com 2 2026-08-29 2026-08-29 ok
content.o9solutions.com 12 2026-04-24 2026-09-14 ok
support.o9solutions.com 5 2026-05-25 2026-09-22 ok
o9con-test.o9solutions.com 6 2026-04-19 2026-08-15 ok
www.o9solutions.com 5 2026-05-15 2026-09-17 ok
goaim10x.o9solutions.com 10 2026-04-24 2026-08-20 ok
play.o9solutions.com 5 2026-05-10 2026-09-08 ok
gallery.o9solutions.com 3 2026-07-02 2026-09-02 ok
community.o9solutions.com 6 2026-05-29 2026-09-27 ok

Programmatic access, with DNS A records: API GET /v1/hosts/o9solutions.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/o9solutions.com.