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.

23 hosts · 265 ms

HostCertsFirst seenLast seenDNS
far.se 11 2026-01-23 2026-08-11 ok
*.far.se 1 2026-01-23 2026-01-23 —
commerce.far.se 6 2026-04-15 2026-06-13 nxdomain
rattning.far.se 4 2026-02-19 2026-10-03 ok
oversattning.far.se 1 2026-09-04 2026-09-04 ok
utbildningscoach.far.se 3 2026-06-04 2026-09-30 ok
medlemai.far.se 3 2026-02-22 2026-10-06 ok
kursmaterial.far.se 2 2026-02-09 2026-06-21 ok
forum.far.se 5 2026-06-02 2026-09-30 ok
integration.far.se 6 2026-05-04 2026-08-30 ok
comm-integration.far.se 6 2026-04-13 2026-06-11 nxdomain
production.far.se 12 2026-04-13 2026-08-10 ok
comm-production.far.se 9 2026-04-14 2026-06-12 nxdomain
preproduction.far.se 12 2026-05-30 2026-09-25 ok
comm-preproduction.far.se 6 2026-04-13 2026-06-11 nxdomain
fls.far.se 2 2026-03-04 2026-07-17 ok
sms.far.se 5 2026-05-30 2026-09-27 ok
e-kurs.far.se 1 2026-02-05 2026-02-05 ok
kursmaterial-uat.far.se 4 2026-02-09 2026-10-04 ok
fls-uat.far.se 2 2026-03-06 2026-07-19 ok
kursmaterial-test.far.se 2 2026-02-09 2026-06-21 ok
kursmaterial-dev.far.se 2 2026-02-09 2026-06-21 ok
www.far.se 10 2026-04-28 2026-08-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/far.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/far.se.