Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

12 hosts · 178 ms

HostCertsFirst seenLast seen
solresor.se 9 2026-04-28 2026-10-05
*.solresor.se 9 2026-04-28 2026-10-05
app.solresor.se 6 2026-05-20 2026-09-23
tp.solresor.se 15 2026-05-18 2026-10-03
utflykter.solresor.se 1 2026-04-20 2026-04-20
www.utflykter.solresor.se 1 2026-04-20 2026-04-20
t.solresor.se 10 2026-05-18 2026-10-03
chat.solresor.se 5 2026-05-14 2026-09-12
dot.solresor.se 5 2026-05-07 2026-09-04
app-dev.solresor.se 1 2026-09-28 2026-09-28
preview.solresor.se 5 2026-05-22 2026-09-24
www.solresor.se 6 2026-05-14 2026-09-17

Programmatic access: API GET /v1/hosts/solresor.se (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/solresor.se.