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.

23 hosts · 335 ms

HostCertsFirst seenLast seenDNS
ccu.com 19 2026-05-12 2026-09-16 ok
*.ccu.com 14 2026-05-12 2026-09-08 —
d1prod-sftp01.ccu.com 2 2025-10-02 2026-09-30 nxdomain
globalla.ccu.com 4 2025-08-01 2026-08-10 ok
lqbweb.ccu.com 3 2025-09-18 2026-09-11 ok
globalsd.ccu.com 1 2025-11-25 2025-11-25 ok
mortgage.ccu.com 2 2026-01-07 2026-01-07 ok
aiportal.ccu.com 4 2026-02-04 2026-09-20 ok
cloud.email.ccu.com 3 2025-09-04 2026-08-24 ok
image.email.ccu.com 3 2026-01-21 2026-08-31 ok
click.email.ccu.com 3 2025-09-08 2026-09-07 ok
view.email.ccu.com 3 2025-09-07 2026-09-07 ok
login.ccu.com 2 2026-01-28 2026-01-28 ok
*.payments.ccu.com 1 2026-01-15 2026-01-15 —
mail-content.payments.ccu.com 1 2026-01-15 2026-01-15 ok
mta-sts.ccu.com 2 2025-10-08 2026-09-08 ok
intranet.ccu.com 2 2026-04-16 2026-04-16 ok
archivestmt.ccu.com 1 2025-12-11 2025-12-11 ok
text.ccu.com 2 2025-08-07 2026-07-08 ok
globallapriv.ccu.com 4 2025-08-01 2026-08-10 ok
globalsdpriv.ccu.com 1 2025-11-25 2025-11-25 ok
www.ccu.com 5 2026-05-19 2026-09-16 ok
apply.ccu.com 1 2026-04-27 2026-04-27 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ccu.com (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/ccu.com.