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.

13 hosts · 260 ms

HostCertsFirst seenLast seenDNS
ideaforgetech.com 15 2025-11-06 2026-09-25 ok
*.ideaforgetech.com 10 2025-11-06 2026-01-05 —
skyforge.ideaforgetech.com 5 2026-05-21 2026-09-18 ok
staging.ideaforgetech.com 3 2026-06-05 2026-08-05 ok
ai.ideaforgetech.com 12 2026-04-22 2026-04-28 nxdomain
fleetdesk.ideaforgetech.com 11 2026-04-29 2026-08-28 ok
testfleetdesk.ideaforgetech.com 1 2026-09-22 2026-09-22 ok
us.ideaforgetech.com 8 2026-05-06 2026-09-01 ok
www.us.ideaforgetech.com 8 2026-05-05 2026-09-01 ok
connect.ideaforgetech.com 4 2026-04-13 2026-08-12 ok
fleet.ideaforgetech.com 21 2026-04-21 2026-04-29 nxdomain
intranet.ideaforgetech.com 6 2026-05-04 2026-09-01 ok
www.ideaforgetech.com 5 2026-05-28 2026-09-25 ok

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