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 · 251 ms

HostCertsFirst seenLast seenDNS
nettotobak.com 20 2026-04-25 2026-10-05 ok
*.nettotobak.com 16 2026-04-25 2026-10-05 —
img.resensera.nettotobak.com 12 2026-04-28 2026-08-24 ok
media-assets.nettotobak.com 4 2026-09-22 2026-09-22 ok
*.media-assets.nettotobak.com 4 2026-09-22 2026-09-22 —
img.nyhetsbrev.nettotobak.com 8 2026-05-07 2026-09-02 servfail
r.nyhetsbrev.nettotobak.com 3 2026-06-20 2026-09-08 ok
simplify.nettotobak.com 3 2026-06-09 2026-08-09 ok

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