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 · 320 ms

HostCertsFirst seenLast seenDNS
idealworld.tv 25 2025-07-16 2026-09-08 ok
*.idealworld.tv 17 2025-07-14 2026-08-21 —
ftdra.idealworld.tv 6 2026-04-16 2026-08-12 ok
accounts-shopify-prod.idealworld.tv 2 2026-04-23 2026-04-23 ok
accounts.idealworld.tv 5 2026-05-12 2026-09-08 ok
www.idealworld.tv 8 2026-04-23 2026-09-14 ok
*.www.idealworld.tv 2 2026-04-23 2026-04-23 —
shopify.idealworld.tv 5 2026-04-23 2026-08-21 ok
sfy.idealworld.tv 2 2026-05-11 2026-05-11 ok
*.sfy.idealworld.tv 2 2026-05-11 2026-05-11 —

Programmatic access, with DNS A records: API GET /v1/hosts/idealworld.tv (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/idealworld.tv.