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.

11 hosts · 250 ms

HostCertsFirst seenLast seen
myoddballs.com 13 2026-05-15 2026-09-25
ca.myoddballs.com 17 2026-04-14 2026-09-26
test-cad.myoddballs.com 15 2026-04-12 2026-10-07
test-usd.myoddballs.com 14 2026-04-11 2026-10-07
mi.myoddballs.com 3 2025-10-22 2026-09-22
us.myoddballs.com 17 2026-04-12 2026-09-24
get.myoddballs.com 5 2026-07-02 2026-09-01
test.myoddballs.com 15 2026-04-13 2026-09-24
sst.myoddballs.com 5 2026-05-13 2026-09-10
text.myoddballs.com 10 2026-05-10 2026-09-05
www.myoddballs.com 15 2026-05-15 2026-09-24

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