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.

33 hosts · 357 ms

HostCertsFirst seenLast seenDNS
ukmedi.co.uk 13 2026-04-15 2026-09-24 ok
*.ukmedi.co.uk 9 2026-05-11 2026-09-24 —
ca.ukmedi.co.uk 4 2026-04-16 2026-08-14 ok
b2b.ukmedi.co.uk 4 2026-04-19 2026-08-16 ok
be.ukmedi.co.uk 4 2026-04-19 2026-08-17 ok
de.ukmedi.co.uk 4 2026-04-19 2026-08-17 ok
ie.ukmedi.co.uk 4 2026-04-17 2026-08-15 ok
se.ukmedi.co.uk 4 2026-04-19 2026-08-17 ok
bg.ukmedi.co.uk 4 2026-04-19 2026-08-17 ok
ch.ukmedi.co.uk 4 2026-04-19 2026-08-15 ok
fi.ukmedi.co.uk 4 2026-04-20 2026-08-16 ok
dk.ukmedi.co.uk 4 2026-04-18 2026-08-16 ok
nl.ukmedi.co.uk 4 2026-04-18 2026-08-15 ok
pl.ukmedi.co.uk 4 2026-04-18 2026-08-16 ok
no.ukmedi.co.uk 4 2026-04-19 2026-08-16 ok
ro.ukmedi.co.uk 4 2026-04-20 2026-08-17 ok
help.ukmedi.co.uk 5 2026-05-12 2026-09-08 ok
br.ukmedi.co.uk 4 2026-04-17 2026-08-15 ok
fr.ukmedi.co.uk 4 2026-04-16 2026-08-14 ok
es.ukmedi.co.uk 4 2026-04-16 2026-08-14 ok
is.ukmedi.co.uk 4 2026-04-19 2026-08-17 ok
links.ukmedi.co.uk 8 2026-05-09 2026-09-04 ok
mta-sts.ukmedi.co.uk 2 2026-05-29 2026-08-08 ok
us.ukmedi.co.uk 4 2026-04-19 2026-08-17 ok
it.ukmedi.co.uk 4 2026-04-17 2026-08-15 ok
account.ukmedi.co.uk 4 2026-04-16 2026-08-14 ok
fast.ukmedi.co.uk 1 2026-09-23 2026-09-23 ok
tralut.ukmedi.co.uk 7 2026-04-09 2026-04-21 nxdomain
checkout.ukmedi.co.uk 1 2026-09-25 2026-09-25 ok
au.ukmedi.co.uk 4 2026-04-17 2026-08-15 ok
eu.ukmedi.co.uk 4 2026-04-15 2026-08-13 ok
www.ukmedi.co.uk 4 2026-04-16 2026-08-13 ok
cz.ukmedi.co.uk 3 2026-04-19 2026-08-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ukmedi.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/ukmedi.co.uk.