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.

2 hosts · 297 ms

HostCertsFirst seenLast seenDNS
allclear-news.com 30 2026-04-09 2026-10-03 ok
*.allclear-news.com 23 2026-04-09 2026-10-03 —

Programmatic access, with DNS A records: API GET /v1/hosts/allclear-news.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/allclear-news.com.