Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

4 hosts · 231 ms

HostCertsFirst seenLast seenDNS
image.uhc-info.com 1 2026-04-11 2026-04-11 ok
click.uhc-info.com 2 2025-06-13 2026-05-31 ok
member.uhc-info.com 3 2025-06-12 2026-06-03 ok
view.uhc-info.com 1 2026-05-17 2026-05-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/uhc-info.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/uhc-info.com.