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.

5 hosts · 178 ms

HostCertsFirst seenLast seen
teknikdelar.se 5 2026-04-27 2026-08-26
returns.teknikdelar.se 20 2026-04-28 2026-10-02
dot.teknikdelar.se 5 2026-05-21 2026-09-18
support.teknikdelar.se 4 2026-04-15 2026-08-13
www.teknikdelar.se 5 2026-04-27 2026-08-26

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