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.

5 hosts · 306 ms

HostCertsFirst seenLast seenDNS
snusmarkt.ch 23 2026-05-16 2026-10-01 ok
*.snusmarkt.ch 21 2026-05-16 2026-10-01 —
m.snusmarkt.ch 6 2026-05-06 2026-09-01 ok
media-assets.snusmarkt.ch 2 2026-09-22 2026-09-22 ok
*.media-assets.snusmarkt.ch 2 2026-09-22 2026-09-22 —

Programmatic access, with DNS A records: API GET /v1/hosts/snusmarkt.ch (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/snusmarkt.ch.