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.

12 hosts · 236 ms

HostCertsFirst seenLast seen
vouchercodes.co.uk 27 2026-04-18 2026-10-02
*.vouchercodes.co.uk 27 2026-04-18 2026-10-02
ec.vouchercodes.co.uk 2 2026-08-07 2026-10-06
auth-zmg.vouchercodes.co.uk 3 2026-07-14 2026-07-14
a.staging.vouchercodes.co.uk 4 2025-06-26 2026-07-26
auth.vouchercodes.co.uk 6 2026-06-06 2026-10-02
auth-webhook.vouchercodes.co.uk 3 2026-04-13 2026-06-12
view.em.vouchercodes.co.uk 6 2026-08-10 2026-10-01
s.vouchercodes.co.uk 1 2025-12-06 2025-12-06
support.vouchercodes.co.uk 5 2026-05-08 2026-09-05
tralut.vouchercodes.co.uk 4 2026-09-04 2026-09-09
a.www.vouchercodes.co.uk 4 2025-06-26 2026-07-26

Programmatic access: API GET /v1/hosts/vouchercodes.co.uk (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/vouchercodes.co.uk.