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.

11 hosts · 250 ms

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HostCertsFirst seenLast seen
printster.co.uk 38 2025-09-21 2026-10-08
*.printster.co.uk 21 2025-09-21 2026-10-08
r.sendbl2.printster.co.uk 3 2026-06-18 2026-09-06
wsprintstermage.printster.co.uk 5 2026-05-15 2026-09-12
r.sendbl.printster.co.uk 5 2026-05-10 2026-10-17
img.email.printster.co.uk 16 2026-04-24 2026-10-18
r.email.printster.co.uk 3 2026-07-04 2026-09-23
magezeninvoices.printster.co.uk 5 2026-05-15 2026-09-12
reports.printster.co.uk 5 2026-05-15 2026-09-12
account.printster.co.uk 15 2026-05-31 2026-10-07
www.printster.co.uk 15 2026-05-17 2026-09-25

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