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.

12 hosts · 244 ms

HostCertsFirst seenLast seen
awarasleep.com 13 2026-01-17 2026-09-29
*.awarasleep.com 8 2026-01-17 2026-09-05
qa.awarasleep.com 5 2026-04-25 2026-08-29
rc.awarasleep.com 5 2026-06-02 2026-10-06
irgdd.awarasleep.com 7 2026-05-22 2026-09-17
stage.awarasleep.com 5 2026-04-24 2026-08-25
mi.awarasleep.com 2 2025-10-08 2026-09-07
trk.awarasleep.com 2 2026-09-08 2026-09-08
wp.awarasleep.com 8 2026-05-07 2026-09-16
next.awarasleep.com 5 2026-05-10 2026-09-11
*.v.qa-env.awarasleep.com 5 2026-05-08 2026-09-10
www.awarasleep.com 5 2026-05-26 2026-09-28

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