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.

7 hosts · 270 ms

HostCertsFirst seenLast seenDNS
exsitec.no 14 2026-04-07 2026-09-29 ok
*.exsitec.no 2 2026-04-07 2026-09-29 —
inside.exsitec.no 8 2026-04-30 2026-08-26 ok
karriere.exsitec.no 10 2026-05-19 2026-09-24 ok
expo.exsitec.no 10 2026-05-01 2026-08-27 ok
webinar.exsitec.no 6 2026-06-13 2026-09-21 ok
www.exsitec.no 10 2026-04-30 2026-08-26 ok

Programmatic access, with DNS A records: API GET /v1/hosts/exsitec.no (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/exsitec.no.