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.

9 hosts · 294 ms

HostCertsFirst seenLast seenDNS
gogroopie.ie 39 2026-05-06 2026-10-01 ok
*.gogroopie.ie 39 2026-05-06 2026-10-01 —
sli.gogroopie.ie 1 2025-09-14 2025-09-14 ok
link.gogroopie.ie 5 2026-05-20 2026-09-17 ok
link.rcmail.gogroopie.ie 4 2026-06-07 2026-10-05 ok
elink.emails.gogroopie.ie 5 2026-02-19 2026-08-19 ok
delivery.notifications.gogroopie.ie 5 2026-04-13 2026-09-22 ok
delivery.alerts.gogroopie.ie 3 2026-05-19 2026-09-04 ok
delivery.support.gogroopie.ie 3 2026-05-19 2026-09-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gogroopie.ie (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/gogroopie.ie.