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.

4 hosts · 290 ms

HostCertsFirst seenLast seenDNS
viroqueenergy.com 7 2026-05-22 2026-09-19 ok
mail.viroqueenergy.com 4 2026-03-13 2026-08-27 nxdomain
www.mail.viroqueenergy.com 4 2026-03-13 2026-08-27 nxdomain
clientes.viroqueenergy.com 6 2026-06-03 2026-10-01 ok

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