Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

13 hosts · 243 ms

HostCertsFirst seenLast seenDNS
motabilityfoundation.org.uk 2 2026-02-18 2026-08-28 ok
mail-a.motabilityfoundation.org.uk 1 2026-05-27 2026-05-27 ok
owa.motabilityfoundation.org.uk 4 2026-02-22 2026-10-06 ok
mail-b.motabilityfoundation.org.uk 1 2026-05-27 2026-05-27 ok
hybrid.motabilityfoundation.org.uk 1 2026-01-28 2026-01-28 nxdomain
applyonline.motabilityfoundation.org.uk 10 2026-02-21 2026-10-05 ok
applyonine.motabilityfoundation.org.uk 2 2026-06-04 2026-06-04 nxdomain
api.motabilityfoundation.org.uk 1 2026-01-14 2026-01-14 ok
mail.motabilityfoundation.org.uk 1 2026-05-27 2026-05-27 ok
difficulties.motabilityfoundation.org.uk 9 2026-04-16 2026-06-04 ok
mta-sts.motabilityfoundation.org.uk 2 2026-02-25 2026-07-15 ok
api-test.motabilityfoundation.org.uk 1 2026-07-14 2026-07-14 ok
www.motabilityfoundation.org.uk 11 2026-02-24 2026-06-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/motabilityfoundation.org.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/motabilityfoundation.org.uk.