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.

19 hosts · 241 ms

HostCertsFirst seenLast seen
peters.co.uk 6 2026-05-02 2026-10-13
furniture.peters.co.uk 5 2026-06-10 2026-10-13
remote.peters.co.uk 1 2025-10-20 2025-10-20
staff.peters.co.uk 1 2025-10-20 2025-10-20
90yearsof.peters.co.uk 5 2026-05-15 2026-09-14
supportyourschoolstaging.peters.co.uk 6 2026-05-20 2026-10-13
picking.peters.co.uk 7 2026-05-04 2026-09-29
testing.peters.co.uk 1 2026-09-22 2026-09-22
marvin.peters.co.uk 6 2026-04-23 2026-10-13
jasper.peters.co.uk 9 2026-05-26 2026-08-25
bibeditor.peters.co.uk 5 2026-05-30 2026-09-26
libraries.peters.co.uk 5 2026-06-11 2026-10-13
www.libraries.peters.co.uk 5 2026-06-11 2026-10-13
schools.peters.co.uk 6 2026-05-02 2026-10-13
www.schools.peters.co.uk 6 2026-05-02 2026-10-13
pharos.peters.co.uk 4 2026-06-10 2026-10-06
news.peters.co.uk 30 2026-05-18 2026-10-02
*.news.peters.co.uk 18 2026-06-04 2026-10-02
www.peters.co.uk 6 2026-05-02 2026-10-13

Programmatic access: API GET /v1/hosts/peters.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/peters.co.uk.