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 · 319 ms

HostCertsFirst seenLast seenDNS
mfmac.com 11 2026-02-14 2026-09-28 ok
*.mfmac.com 7 2026-04-19 2026-08-15 —
yuillandkyle.mfmac.com 3 2026-02-16 2026-09-30 ok
freshdesk.mfmac.com 14 2026-05-12 2026-09-07 ok
ecomms.mfmac.com 3 2026-04-12 2026-06-14 nodata
mta-sts.mfmac.com 1 2025-11-04 2025-11-04 ok
www.mfmac.com 4 2026-02-14 2026-09-28 ok

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