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.

16 hosts · 289 ms

HostCertsFirst seenLast seen
grb.uk.com 24 2026-01-27 2026-10-02
*.grb.uk.com 18 2026-01-27 2026-10-02
service2.grb.uk.com 1 2026-09-25 2026-09-25
dashboard.grb.uk.com 7 2026-10-01 2026-10-06
subscribe.grb.uk.com 4 2026-04-12 2026-08-10
service.grb.uk.com 5 2026-05-06 2026-09-03
clerk.grb.uk.com 2 2026-10-06 2026-10-06
cdn.grb.uk.com 2 2025-07-30 2026-06-29
test-cdn.grb.uk.com 3 2026-04-19 2026-09-19
fun.grb.uk.com 4 2026-04-18 2026-08-16
screens.grb.uk.com 4 2026-06-09 2026-10-07
job-insights.grb.uk.com 8 2026-05-12 2026-07-27
accounts.grb.uk.com 2 2026-10-06 2026-10-06
surveys.grb.uk.com 5 2026-05-17 2026-09-14
dev.grb.uk.com 5 2026-05-07 2026-09-04
www.grb.uk.com 6 2026-01-28 2026-09-02

Programmatic access: API GET /v1/hosts/grb.uk.com (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/grb.uk.com.