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.

9 hosts · 226 ms

HostCertsFirst seenLast seen
c0mplex1.com 24 2026-04-19 2026-09-21
*.c0mplex1.com 20 2026-05-26 2026-09-21
demo2.c0mplex1.com 2 2026-06-16 2026-06-16
cpanel.c0mplex1.com 4 2026-04-19 2026-08-19
demo.c0mplex1.com 2 2026-06-11 2026-06-11
shop.c0mplex1.com 5 2026-05-31 2026-09-30
mcdr.c0mplex1.com 4 2026-05-26 2026-08-02
srvr.c0mplex1.com 5 2026-05-24 2026-09-21
www.c0mplex1.com 4 2026-04-19 2026-08-19

Programmatic access: API GET /v1/hosts/c0mplex1.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/c0mplex1.com.