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 · 249 ms

HostCertsFirst seenLast seen
royalqueenseeds.com 21 2026-05-11 2026-10-06
*.royalqueenseeds.com 21 2026-05-11 2026-09-14
beta.royalqueenseeds.com 4 2026-06-08 2026-10-06
t.service.royalqueenseeds.com 5 2026-06-02 2026-08-01
site.royalqueenseeds.com 13 2026-06-04 2026-09-30
t.news.royalqueenseeds.com 5 2026-06-02 2026-08-01
ctx.royalqueenseeds.com 11 2026-04-14 2026-08-15
load.ctx.royalqueenseeds.com 12 2026-04-14 2026-10-08
library.royalqueenseeds.com 3 2026-06-16 2026-08-15

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