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.

34 hosts · 287 ms

HostCertsFirst seenLast seenDNS
wcu.com 23 2026-02-24 2026-09-17 ok
*.wcu.com 11 2026-04-22 2026-09-07 —
cardwizard.wcu.com 2 2025-12-09 2026-01-27 nxdomain
www.cardwizard.wcu.com 2 2025-12-09 2026-01-27 nxdomain
applyonline.wcu.com 13 2026-06-06 2026-10-02 ok
applysecure.wcu.com 1 2025-08-14 2025-08-14 nxdomain
www.applysecure.wcu.com 1 2025-08-14 2025-08-14 nxdomain
staging.wcu.com 26 2026-04-25 2026-09-24 ok
*.staging.wcu.com 16 2026-04-25 2026-09-24 —
www.staging.wcu.com 10 2026-05-05 2026-09-17 ok
onlinebanking.wcu.com 1 2026-02-04 2026-02-04 ok
www.onlinebanking.wcu.com 1 2026-02-04 2026-02-04 nxdomain
email.fmgemail.wcu.com 2 2026-05-20 2026-05-20 ok
mymail.wcu.com 4 2025-12-06 2026-09-09 ok
www.mymail.wcu.com 4 2025-12-06 2026-09-09 nxdomain
suggestion.wcu.com 3 2025-07-04 2026-07-05 nxdomain
www.suggestion.wcu.com 3 2025-07-04 2026-07-05 nxdomain
sip1hq.wcu.com 2 2026-03-09 2026-05-07 ok
www.sip1hq.wcu.com 2 2026-03-09 2026-05-07 nxdomain
sip2hq.wcu.com 2 2026-03-09 2026-05-07 ok
www.sip2hq.wcu.com 2 2026-03-09 2026-05-07 nxdomain
vpnhq.wcu.com 2 2025-10-31 2025-11-24 ok
www.vpnhq.wcu.com 2 2025-10-31 2025-11-24 nxdomain
vpndr.wcu.com 2 2025-10-31 2025-11-24 ok
www.vpndr.wcu.com 2 2025-10-31 2025-11-24 nxdomain
sipdr.wcu.com 2 2026-03-09 2026-05-07 ok
www.sipdr.wcu.com 2 2026-03-09 2026-05-07 nxdomain
investments.wcu.com 18 2026-05-25 2026-09-20 ok
planit.wcu.com 1 2025-06-26 2025-06-26 ok
wcudatamart.wcu.com 2 2026-01-10 2026-01-21 ok
www.wcudatamart.wcu.com 2 2026-01-10 2026-01-21 nxdomain
dev.wcu.com 26 2026-04-13 2026-09-28 nodata
*.dev.wcu.com 26 2026-04-13 2026-09-28 —
www.wcu.com 10 2026-05-05 2026-09-17 ok

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