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 · 259 ms

HostCertsFirst seenLast seenDNS
trim-rite.com 15 2026-05-13 2026-10-02 ok
*.trim-rite.com 10 2026-05-13 2026-10-02 —
local.trim-rite.com 3 2026-03-03 2026-09-28 nodata
*.local.trim-rite.com 3 2026-03-03 2026-09-28 —
wireless.local.trim-rite.com 4 2026-04-12 2026-10-05 nxdomain
www.wireless.local.trim-rite.com 4 2026-04-12 2026-10-05 nxdomain
mta-sts.trim-rite.com 5 2026-05-19 2026-09-16 ok
www.trim-rite.com 5 2026-05-30 2026-09-12 ok

Programmatic access, with DNS A records: API GET /v1/hosts/trim-rite.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/trim-rite.com.