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.

10 hosts · 332 ms

HostCertsFirst seenLast seenDNS
ayaeducation.com 11 2026-01-19 2026-08-20 ok
*.ayaeducation.com 8 2026-01-19 2026-08-20 —
www-stage.ayaeducation.com 3 2026-06-02 2026-08-03 ok
mta-sts.ayaeducation.com 3 2026-05-13 2026-10-03 ok
www-int.ayaeducation.com 3 2026-06-02 2026-08-03 ok
www-cint.ayaeducation.com 5 2026-04-22 2026-08-24 ok
www-sint.ayaeducation.com 5 2026-04-22 2026-08-24 ok
www-hot.ayaeducation.com 3 2026-06-02 2026-08-03 ok
www-dev.ayaeducation.com 5 2026-05-28 2026-09-29 ok
www.ayaeducation.com 3 2026-06-02 2026-08-03 ok

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