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.

28 hosts · 377 ms

HostCertsFirst seenLast seenDNS
softwareacademy.co.uk 5 2026-04-24 2026-08-24 ok
*.softwareacademy.co.uk 8 2026-04-24 2026-09-06 —
app2.softwareacademy.co.uk 1 2026-09-30 2026-09-30 ok
online.softwareacademy.co.uk 12 2026-04-18 2026-08-14 ok
knack.softwareacademy.co.uk 3 2026-06-29 2026-08-29 ok
www.knack.softwareacademy.co.uk 3 2026-06-29 2026-08-29 ok
homework.softwareacademy.co.uk 1 2026-09-07 2026-09-07 ok
www.homework.softwareacademy.co.uk 1 2026-09-07 2026-09-07 ok
dstnyclothing.co.uk.softwareacademy.co.uk 5 2026-05-07 2026-09-06 ok
www.dstnyclothing.co.uk.softwareacademy.co.uk 5 2026-05-07 2026-09-06 ok
graduation.softwareacademy.co.uk 3 2026-07-21 2026-09-20 ok
www.graduation.softwareacademy.co.uk 3 2026-07-21 2026-09-20 ok
help.softwareacademy.co.uk 2 2026-05-07 2026-05-07 ok
www.help.softwareacademy.co.uk 5 2026-05-07 2026-09-06 ok
app.softwareacademy.co.uk 2 2026-09-07 2026-09-08 ok
cpanel.app.softwareacademy.co.uk 1 2026-09-08 2026-09-08 ok
www.app.softwareacademy.co.uk 2 2026-09-07 2026-09-08 ok
whatsapp.softwareacademy.co.uk 3 2026-05-07 2026-09-10 ok
webdisk.whatsapp.softwareacademy.co.uk 1 2026-09-10 2026-09-10 ok
cpanel.whatsapp.softwareacademy.co.uk 1 2026-09-10 2026-09-10 ok
cpcalendars.whatsapp.softwareacademy.co.uk 1 2026-09-10 2026-09-10 ok
www.whatsapp.softwareacademy.co.uk 6 2026-05-07 2026-09-10 ok
www.virtuallens.softwareacademy.co.uk 5 2026-04-24 2026-08-24 ok
cacerts.softwareacademy.co.uk 7 2026-04-24 2026-08-25 ok
www.cacerts.softwareacademy.co.uk 7 2026-04-24 2026-08-25 ok
dev.softwareacademy.co.uk 3 2026-06-07 2026-08-07 ok
www.dev.softwareacademy.co.uk 3 2026-06-07 2026-08-07 ok
newdev.softwareacademy.co.uk 2 2026-07-20 2026-07-20 ok

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