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.

11 hosts · 357 ms

HostCertsFirst seenLast seenDNS
balanz.com 26 2025-11-19 2026-10-03 ok
*.balanz.com 22 2026-04-07 2026-10-03 —
mail.ap.balanz.com 8 2026-05-28 2026-09-27 ok
webmail.ap.balanz.com 8 2026-05-28 2026-09-27 ok
autodiscover.ap.balanz.com 8 2026-05-28 2026-09-27 ok
clientes.balanz.com 1 2026-03-12 2026-03-12 ok
www.clientes.balanz.com 1 2026-03-12 2026-03-12 nxdomain
mta-sts.balanz.com 5 2026-05-10 2026-09-08 ok
copilot.balanz.com 5 2026-09-14 2026-09-23 ok
*.copilot.balanz.com 3 2026-09-23 2026-09-23 —
api.copilot.balanz.com 5 2026-09-14 2026-09-15 ok

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