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 · 238 ms

HostCertsFirst seenLast seenDNS
gmoretech.com 5 2025-12-25 2026-02-05 ok
*.gmoretech.com 3 2025-12-25 2026-02-03 —
www2.gmoretech.com 10 2026-04-28 2026-09-25 ok
www.gmoretech.com 2 2026-02-05 2026-02-05 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gmoretech.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/gmoretech.com.