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.

19 hosts · 173 ms

HostCertsFirst seenLast seen
resurs.se 6 2025-07-30 2026-09-14
*.resurs.se 7 2025-09-03 2026-09-14
static.resurs.se 4 2026-04-16 2026-08-26
identitybridge.resurs.se 1 2026-09-24 2026-09-24
secure.resurs.se 3 2026-06-10 2026-08-15
foretag.resurs.se 4 2026-04-16 2026-08-26
suomi.resurs.se 4 2026-03-25 2026-09-09
mail.resurs.se 1 2025-11-21 2025-11-21
www.mail.resurs.se 1 2025-11-21 2025-11-21
aka-redirect.integration.resurs.se 3 2026-06-15 2026-08-20
smtp.resurs.se 1 2025-11-21 2025-11-21
www.smtp.resurs.se 1 2025-11-21 2025-11-21
autodiscover.resurs.se 1 2025-11-21 2025-11-21
www.autodiscover.resurs.se 1 2025-11-21 2025-11-21
jamfadcs.resurs.se 5 2026-05-05 2026-09-14
developers.resurs.se 1 2026-03-25 2026-03-25
status.resurs.se 3 2026-06-06 2026-08-11
internalstatus.resurs.se 4 2026-04-16 2026-08-26
www.resurs.se 5 2025-07-30 2026-09-13

Programmatic access: API GET /v1/hosts/resurs.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/resurs.se.