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.

60 hosts · 193 ms

HostCertsFirst seenLast seen
leeds.gov.uk 14 2025-09-08 2026-10-03
*.leeds.gov.uk 91 2025-09-08 2026-09-15
mail-a.leeds.gov.uk 1 2026-02-13 2026-02-13
mail-b.leeds.gov.uk 1 2026-02-13 2026-02-13
dwp-asc.leeds.gov.uk 3 2026-09-30 2026-10-06
exchange.leeds.gov.uk 3 2025-08-12 2026-08-21
www.exchange.leeds.gov.uk 3 2025-08-12 2026-08-21
enquiry-active.leeds.gov.uk 2 2026-03-25 2026-08-25
link.epitaph.leeds.gov.uk 5 2026-05-11 2026-09-08
ascreferral.leeds.gov.uk 1 2025-12-17 2025-12-17
mail.leeds.gov.uk 1 2026-02-13 2026-02-13
eforms-admin.leeds.gov.uk 2 2025-07-14 2026-06-14
www.libraries.leeds.gov.uk 3 2025-06-18 2026-05-19
museumsandgalleries.leeds.gov.uk 3 2026-06-09 2026-08-31
*.museumsandgalleries.leeds.gov.uk 3 2026-06-09 2026-08-31
*.files.leeds.gov.uk 2 2026-02-27 2026-07-30
parkingfines.leeds.gov.uk 1 2026-06-30 2026-06-30
dwp-cis.leeds.gov.uk 1 2026-05-20 2026-05-20
comms.leeds.gov.uk 9 2026-05-06 2026-09-04
email.comms.leeds.gov.uk 5 2026-05-10 2026-09-07
eforms.leeds.gov.uk 2 2025-07-14 2026-06-14
mta-sts.leeds.gov.uk 5 2026-05-14 2026-09-09
news.leeds.gov.uk 2 2026-05-11 2026-09-03
surveys.leeds.gov.uk 18 2026-05-02 2026-08-28
enquiry-active-act.leeds.gov.uk 2 2026-03-26 2026-08-26
ascreferral-act.leeds.gov.uk 1 2025-12-02 2025-12-02
eforms-admin-act.leeds.gov.uk 2 2025-07-14 2026-06-14
eforms-act.leeds.gov.uk 2 2025-07-14 2026-06-14
highrisesafety-act.leeds.gov.uk 2 2025-10-02 2026-09-02
www.highrisesafety-act.leeds.gov.uk 2 2025-10-02 2026-09-02
workspace.sft.leeds.gov.uk 1 2026-06-26 2026-06-26
www.workspace.sft.leeds.gov.uk 1 2026-06-26 2026-06-26
myit.leeds.gov.uk 8 2026-10-05 2026-10-05
enquiry-active-int.leeds.gov.uk 2 2026-03-25 2026-08-25
ascreferral-int.leeds.gov.uk 1 2025-12-01 2025-12-01
eforms-admin-int.leeds.gov.uk 2 2025-07-14 2026-06-14
eforms-int.leeds.gov.uk 2 2025-07-14 2026-06-14
highrisesafety-int.leeds.gov.uk 2 2025-10-01 2026-09-01
www.highrisesafety-int.leeds.gov.uk 2 2025-10-01 2026-09-01
archive-test.leeds.gov.uk 2 2026-08-17 2026-08-17
myit-test.leeds.gov.uk 3 2026-10-05 2026-10-05
archive-dev.leeds.gov.uk 2 2026-08-17 2026-08-17
enquiry-active-dev.leeds.gov.uk 2 2026-03-23 2026-08-23
ascreferral-dev.leeds.gov.uk 1 2025-11-30 2025-11-30
eforms-admin-dev.leeds.gov.uk 2 2025-07-14 2026-06-14
eforms-dev.leeds.gov.uk 2 2025-07-14 2026-06-14
my-dev.leeds.gov.uk 1 2026-10-08 2026-10-08
highrisesafety-dev.leeds.gov.uk 4 2025-06-23 2026-09-01
www.highrisesafety-dev.leeds.gov.uk 2 2025-10-01 2026-09-01
www.leeds.gov.uk 49 2025-11-13 2026-09-15
legalfileindex.leeds.gov.uk 1 2026-09-02 2026-09-02
enquiry-active-sandbox.leeds.gov.uk 3 2026-03-24 2026-08-24
ascreferral-sandbox.leeds.gov.uk 3 2026-03-24 2026-08-24
highrisesafety-sandbox.leeds.gov.uk 3 2026-03-24 2026-08-24
observatory.leeds.gov.uk 4 2026-05-27 2026-10-10
directory.leeds.gov.uk 1 2026-07-27 2026-07-27
*.directory.leeds.gov.uk 1 2026-07-27 2026-07-27
admin.directory.leeds.gov.uk 1 2026-07-27 2026-07-27
highrisesafety.leeds.gov.uk 2 2025-10-08 2026-09-08
www.highrisesafety.leeds.gov.uk 2 2025-10-08 2026-09-08

Programmatic access: API GET /v1/hosts/leeds.gov.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/leeds.gov.uk.