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.

19 hosts · 432 ms

HostCertsFirst seenLast seenDNS
tranas.se 6 2026-01-15 2026-09-22 ok
*.tranas.se 1 2026-01-15 2026-01-15 —
servicedeskinfo2.tranas.se 5 2026-04-27 2026-09-26 ok
servicedeskinfo3.tranas.se 5 2026-04-27 2026-09-26 ok
beta.tranas.se 1 2026-08-28 2026-08-28 ok
titta.tranas.se 5 2026-04-27 2026-09-26 ok
bookitpub.tranas.se 4 2026-05-19 2026-07-28 ok
1t1service.tranas.se 5 2026-04-27 2026-09-26 ok
servicedesk.tranas.se 10 2026-04-27 2026-07-30 ok
tittain.tranas.se 5 2026-04-27 2026-09-26 ok
webcon.tranas.se 1 2026-01-27 2026-01-27 ok
servicedeskinfo.tranas.se 7 2026-04-27 2026-09-26 ok
interninfo.tranas.se 2 2026-02-26 2026-06-18 ok
sip.tranas.se 1 2026-01-27 2026-01-27 nxdomain
www.sip.tranas.se 1 2026-01-27 2026-01-27 nxdomain
itwp.tranas.se 1 2026-08-28 2026-08-28 ok
mta-sts.tranas.se 1 2026-09-28 2026-09-28 ok
holavedsgymnasiet.tranas.se 1 2026-04-08 2026-04-08 ok
www.tranas.se 5 2026-04-23 2026-09-22 ok

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