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.

20 hosts · 348 ms

HostCertsFirst seenLast seenDNS
velocitycu.com 63 2026-03-10 2026-10-05 ok
*.velocitycu.com 20 2026-03-10 2026-09-20 —
ww2.velocitycu.com 8 2026-04-19 2026-08-16 ok
dnatemweb.velocitycu.com 5 2026-05-13 2026-09-10 ok
temenosweb.velocitycu.com 5 2026-05-17 2026-09-15 ok
olb.velocitycu.com 11 2026-04-16 2026-08-13 ok
onboard.velocitycu.com 12 2026-04-25 2026-08-21 ok
marketplace.velocitycu.com 17 2026-04-24 2026-08-20 ok
remote.velocitycu.com 5 2026-04-14 2026-09-10 ok
link.velocitycu.com 5 2026-05-15 2026-09-12 ok
twdl.velocitycu.com 5 2026-05-17 2026-09-15 ok
mail.velocitycu.com 5 2026-05-23 2026-09-20 ok
smtp.velocitycu.com 5 2026-05-23 2026-09-20 nxdomain
broker.velocitycu.com 5 2026-05-09 2026-09-06 ok
autodiscover.velocitycu.com 5 2026-05-23 2026-09-20 ok
ftps.velocitycu.com 5 2026-05-04 2026-09-02 ok
offers.velocitycu.com 10 2026-04-27 2026-08-23 ok
cualerts.velocitycu.com 5 2026-05-19 2026-09-16 ok
mta-sts.velocitycu.com 26 2026-04-11 2026-10-05 ok
www.velocitycu.com 13 2026-04-18 2026-08-26 ok

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