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.

7 hosts · 308 ms

HostCertsFirst seenLast seenDNS
teamland.com 10 2026-05-02 2026-08-28 ok
form.teamland.com 3 2026-05-25 2026-09-22 ok
extension.teamland.com 4 2026-04-19 2026-08-18 ok
learn.teamland.com 1 2025-11-12 2025-11-12 ok
guides.teamland.com 2 2026-08-26 2026-08-26 ok
mta-sts.teamland.com 4 2026-04-19 2026-08-17 ok
www.teamland.com 8 2026-05-06 2026-09-02 ok

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