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.

27 hosts · 268 ms

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HostCertsFirst seenLast seen
picniq.co.uk 24 2026-05-07 2026-09-28
*.picniq.co.uk 24 2026-05-07 2026-09-28
test-profile-tracking2.picniq.co.uk 5 2026-05-18 2026-09-16
test-account2.picniq.co.uk 5 2026-05-18 2026-09-14
dev-account2.picniq.co.uk 4 2026-06-13 2026-10-12
k-media.picniq.co.uk 8 2026-07-20 2026-09-17
theatre.picniq.co.uk 3 2026-06-19 2026-08-19
hotelquote.picniq.co.uk 2 2026-06-20 2026-06-20
test-hotelquote.picniq.co.uk 4 2026-05-12 2026-07-11
capig.picniq.co.uk 8 2026-06-14 2026-10-10
profile-tracking.picniq.co.uk 5 2026-05-11 2026-09-07
test-profile-tracking.picniq.co.uk 5 2026-05-10 2026-09-07
dev-profile-tracking.picniq.co.uk 5 2026-05-07 2026-09-05
test-tickets-api.picniq.co.uk 5 2026-05-18 2026-09-15
dev-tickets-api.picniq.co.uk 5 2026-04-24 2026-08-22
team.picniq.co.uk 2 2026-04-25 2026-04-25
test-admin.picniq.co.uk 5 2026-05-18 2026-09-15
dev-admin.picniq.co.uk 5 2026-04-26 2026-08-24
newadmin.picniq.co.uk 4 2026-06-05 2026-10-03
test-newadmin.picniq.co.uk 6 2026-06-04 2026-10-01
dev-newadmin.picniq.co.uk 4 2026-06-07 2026-10-05
holidays.picniq.co.uk 5 2026-04-26 2026-08-25
account.picniq.co.uk 3 2026-06-21 2026-08-20
test-account.picniq.co.uk 4 2026-06-15 2026-10-14
dev-account.picniq.co.uk 5 2026-05-13 2026-09-10
test.picniq.co.uk 5 2026-05-18 2026-09-15
dev.picniq.co.uk 5 2026-05-06 2026-09-04

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