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 · 272 ms

HostCertsFirst seenLast seenDNS
intra.m-g-c.com 2 2025-10-04 2025-10-04 ok
www.intra.m-g-c.com 2 2025-10-04 2025-10-04 nxdomain
info.m-g-c.com 5 2026-05-01 2026-08-30 ok
f.info.m-g-c.com 5 2026-05-01 2026-08-30 ok
s.info.m-g-c.com 5 2026-05-01 2026-08-30 ok
emt.m-g-c.com 4 2026-06-08 2026-10-06 ok
f.emt.m-g-c.com 4 2026-06-08 2026-10-06 ok
s.emt.m-g-c.com 4 2026-06-08 2026-10-06 ok

Programmatic access, with DNS A records: API GET /v1/hosts/m-g-c.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/m-g-c.com.