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.

9 hosts · 183 ms

HostCertsFirst seenLast seen
johnells.se 12 2026-04-29 2026-09-11
*.johnells.se 6 2026-04-29 2026-09-11
stock.johnells.se 2 2026-10-03 2026-10-03
sgtm.johnells.se 3 2026-05-24 2026-09-11
cdn.johnells.se 5 2026-04-26 2026-10-03
go.johnells.se 6 2026-06-07 2026-10-05
helpcenter.johnells.se 3 2025-10-23 2026-09-23
jarvis.johnells.se 6 2026-04-25 2026-10-03
www.johnells.se 6 2026-05-04 2026-09-01

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