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.

6 hosts · 251 ms

HostCertsFirst seenLast seenDNS
influence.rs 13 2026-04-21 2026-10-05 ok
*.influence.rs 8 2026-04-29 2026-10-05 —
unsub.influence.rs 5 2026-04-16 2026-08-13 ok
texting.influence.rs 1 2026-09-13 2026-09-13 ok
links.influence.rs 5 2026-05-27 2026-09-23 ok
www.influence.rs 5 2026-04-21 2026-09-06 ok

Programmatic access, with DNS A records: API GET /v1/hosts/influence.rs (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/influence.rs.