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.

7 hosts · 311 ms

HostCertsFirst seenLast seenDNS
dispendix.com 24 2026-05-27 2026-09-23 ok
*.dispendix.com 1 2025-09-14 2025-09-14 —
cloud.dispendix.com 3 2025-10-15 2026-09-15 ok
info.dispendix.com 6 2026-04-28 2026-08-24 ok
meet.dispendix.com 14 2026-05-29 2026-09-24 ok
sst.dispendix.com 5 2026-05-19 2026-09-16 ok
www.dispendix.com 11 2026-05-27 2026-09-22 ok

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