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.

6 hosts · 408 ms

HostCertsFirst seenLast seenDNS
perfectwhitetee.com 23 2026-04-20 2026-09-27 ok
*.perfectwhitetee.com 6 2026-04-20 2026-09-27 —
link.perfectwhitetee.com 5 2026-04-25 2026-08-23 ok
dtm.perfectwhitetee.com 1 2026-07-02 2026-07-02 ok
mta-sts.perfectwhitetee.com 2 2026-06-04 2026-08-14 ok
www.perfectwhitetee.com 16 2026-05-19 2026-09-29 ok

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