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.

5 hosts · 345 ms

HostCertsFirst seenLast seenDNS
answeringservicecare.net 22 2025-11-29 2026-10-04 ok
*.answeringservicecare.net 8 2025-11-29 2026-10-04 —
secure.answeringservicecare.net 4 2026-06-06 2026-10-04 ok
assist.answeringservicecare.net 10 2026-04-22 2026-08-20 ok
www.answeringservicecare.net 17 2026-04-14 2026-08-11 ok

Programmatic access, with DNS A records: API GET /v1/hosts/answeringservicecare.net (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/answeringservicecare.net.