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.

29 hosts · 293 ms

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HostCertsFirst seenLast seen
topsolid.com 23 2025-07-16 2026-09-07
*.topsolid.com 23 2025-07-16 2026-09-07
vision360.topsolid.com 1 2026-09-24 2026-09-24
cdn2.topsolid.com 9 2026-04-26 2026-10-08
store.topsolid.com 5 2026-04-22 2026-08-20
staging.store.topsolid.com 5 2026-06-04 2026-10-02
phpmyadmin.staging.store.topsolid.com 5 2026-06-03 2026-10-02
cdn.store.topsolid.com 9 2026-04-28 2026-10-10
cdn.filestore.topsolid.com 10 2026-04-25 2026-10-07
update.topsolid.com 9 2026-04-26 2026-10-08
*.swupdate.topsolid.com 2 2025-10-23 2026-09-23
email.topsolid.com 18 2026-06-16 2026-10-18
frc.pdm.topsolid.com 4 2026-05-06 2026-07-29
cdn.topsolid.com 9 2026-04-26 2026-10-08
admin.topsolid.com 1 2026-01-15 2026-01-15
extranet-formation.topsolid.com 10 2026-05-11 2026-09-07
partner.topsolid.com 1 2026-05-03 2026-05-03
webviewer.topsolid.com 1 2026-09-17 2026-09-17
monitor.topsolid.com 4 2026-06-19 2026-10-17
openapi.monitor.topsolid.com 3 2026-07-08 2026-09-06
opentrak.monitor.topsolid.com 3 2026-07-08 2026-09-06
chartmuseum.monitor.topsolid.com 4 2026-06-08 2026-10-06
rancher.monitor.topsolid.com 5 2026-05-29 2026-09-26
ideas.topsolid.com 5 2026-05-07 2026-09-04
cls.topsolid.com 1 2026-07-09 2026-07-09
assets.topsolid.com 1 2026-10-13 2026-10-13
mkt.topsolid.com 8 2026-05-15 2026-09-24
content.topsolid.com 10 2026-06-18 2026-10-14
eliott.topsolid.com 4 2026-06-09 2026-10-07

Programmatic access: API GET /v1/hosts/topsolid.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/topsolid.com.