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.

10 hosts · 253 ms

Download CSV
HostCertsFirst seenLast seen
ap.com 12 2026-05-13 2026-09-19
*.ap.com 7 2026-05-13 2026-09-19
staging.ap.com 5 2026-04-25 2026-08-23
link.ap.com 5 2026-05-30 2026-09-27
go.ap.com 10 2026-05-05 2026-10-02
jp.ap.com 5 2026-05-05 2026-09-02
revamp.ap.com 4 2026-06-09 2026-10-07
shop.ap.com 19 2026-06-01 2026-10-09
dev.ap.com 5 2026-04-25 2026-08-23
www.ap.com 5 2026-05-17 2026-09-14

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