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.

3 hosts · 354 ms

HostCertsFirst seenLast seenDNS
cwljonesboroar.gov 15 2026-05-12 2026-10-01 ok
*.cwljonesboroar.gov 10 2026-06-04 2026-10-01 —
www.cwljonesboroar.gov 5 2026-05-12 2026-08-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/cwljonesboroar.gov (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/cwljonesboroar.gov.