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.

5 hosts · 245 ms

HostCertsFirst seenLast seen
gcfoods.com 5 2026-04-16 2026-10-08
edi.gcfoods.com 1 2025-12-10 2025-12-10
www.edi.gcfoods.com 1 2025-12-10 2025-12-10
mta-sts.gcfoods.com 2 2025-10-19 2026-09-19
www.gcfoods.com 5 2026-06-02 2026-09-15

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