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.

15 hosts · 318 ms

HostCertsFirst seenLast seenDNS
matsato-official.com 22 2026-04-14 2026-09-19 ok
*.matsato-official.com 12 2026-04-14 2026-09-19 —
send.matsato-official.com 11 2026-06-02 2026-09-28 ok
click1.send.matsato-official.com 5 2026-04-27 2026-08-25 ok
click.send.matsato-official.com 8 2026-05-05 2026-08-31 ok
images.send.matsato-official.com 8 2026-05-05 2026-08-31 ok
mta-sts.images.send.matsato-official.com 10 2026-05-05 2026-08-31 ok
i.matsato-official.com 3 2026-05-30 2026-09-15 ok
click1.info.matsato-official.com 5 2026-04-27 2026-08-25 ok
click.info.matsato-official.com 8 2026-05-05 2026-08-31 ok
mta-sts.images.info.matsato-official.com 8 2026-05-05 2026-08-31 ok
go.matsato-official.com 3 2026-07-28 2026-09-25 ok
tracktor.matsato-official.com 8 2026-05-05 2026-08-31 ok
mta-sts.matsato-official.com 10 2026-05-05 2026-08-31 ok
www.matsato-official.com 8 2026-05-05 2026-08-31 ok

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