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.

6 hosts · 327 ms

HostCertsFirst seenLast seenDNS
zealty.ca 2 2026-03-28 2026-08-28 ok
*.zealty.ca 4 2025-08-13 2026-08-28 —
static.zealty.ca 1 2025-08-13 2025-08-13 ok
click.zealty.ca 3 2026-09-30 2026-09-30 ok
go.zealty.ca 1 2026-09-24 2026-09-24 ok
s.zealty.ca 6 2026-04-25 2026-08-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/zealty.ca (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/zealty.ca.