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.

8 hosts · 378 ms

HostCertsFirst seenLast seenDNS
firstpointcollectionresources.com 11 2026-05-25 2026-09-20 ok
*.firstpointcollectionresources.com 8 2026-05-25 2026-09-20 —
url1291.firstpointcollectionresources.com 2 2026-08-14 2026-08-14 ok
portal.firstpointcollectionresources.com 5 2026-05-25 2026-09-22 ok
contact.firstpointcollectionresources.com 2 2026-08-14 2026-08-14 ok
url3793.contact.firstpointcollectionresources.com 2 2026-08-14 2026-08-14 ok
url7609.contact.firstpointcollectionresources.com 2 2026-08-14 2026-08-14 ok
www.firstpointcollectionresources.com 2 2026-08-14 2026-08-14 ok

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