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.

8 hosts · 615 ms

HostCertsFirst seenLast seenDNS
accrueme.com 3 2026-05-25 2026-08-02 ok
*.accrueme.com 1 2026-06-14 2026-06-14 —
portal.accrueme.com 3 2026-02-18 2026-10-02 ok
app.accrueme.com 2 2026-02-23 2026-06-16 ok
mta-sts.accrueme.com 2 2026-04-19 2026-06-29 ok
summit.accrueme.com 10 2026-05-07 2026-09-02 ok
dev.accrueme.com 2 2026-02-06 2026-05-25 nxdomain
www.accrueme.com 2 2026-05-25 2026-08-02 ok

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