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.

25 hosts · 274 ms

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HostCertsFirst seenLast seen
wesentra.com 33 2025-08-04 2026-09-25
*.wesentra.com 26 2025-08-04 2026-09-25
test1010.wesentra.com 1 2025-10-10 2025-10-10
multi-sans10.wesentra.com 1 2025-09-03 2025-09-03
multi-sans1.wesentra.com 3 2025-09-03 2025-09-12
test1.wesentra.com 2 2025-09-03 2026-08-05
multi-sans2.wesentra.com 2 2025-09-03 2025-09-08
test2.wesentra.com 2 2025-09-03 2026-08-05
testi123.wesentra.com 2 2025-08-30 2025-09-03
multi-sans3.wesentra.com 1 2025-09-03 2025-09-03
multi-sans4.wesentra.com 1 2025-09-03 2025-09-03
*.testing.wesentra.com 2 2025-10-08 2025-10-08
n8n.wesentra.com 2 2026-01-07 2026-01-09
test.application.wesentra.com 4 2025-09-24 2025-09-29
iis-demo.wesentra.com 7 2026-04-20 2026-06-10
www.iis-demo.wesentra.com 3 2026-04-20 2026-06-04
nginx-demo.wesentra.com 2 2026-04-23 2026-07-20
app.wesentra.com 1 2025-09-04 2025-09-04
multi-sans.wesentra.com 3 2025-09-03 2025-09-12
test.wesentra.com 7 2025-09-12 2026-02-20
*.test.wesentra.com 4 2026-02-20 2026-02-20
2909test.wesentra.com 1 2025-09-29 2025-09-29
evtest.wesentra.com 1 2026-03-31 2026-03-31
n8n-dev.wesentra.com 1 2026-01-14 2026-01-14
www.wesentra.com 8 2025-08-20 2025-09-29

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