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.

4 hosts · 206 ms

HostCertsFirst seenLast seen
oneida-air.com 30 2025-08-07 2026-09-23
*.oneida-air.com 30 2025-08-07 2026-09-23
staging2.oneida-air.com 5 2026-05-25 2026-09-26
partners.oneida-air.com 3 2026-05-17 2026-09-14

Programmatic access: API GET /v1/hosts/oneida-air.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/oneida-air.com.