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.

3 hosts · 248 ms

HostCertsFirst seenLast seenDNS
pomelogroup.com 19 2026-04-13 2026-09-28 ok
*.pomelogroup.com 7 2026-05-29 2026-09-28 —
www.pomelogroup.com 10 2026-04-14 2026-08-10 ok

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