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.

30 hosts · 408 ms

HostCertsFirst seenLast seenDNS
williamfry.com 27 2026-04-19 2026-10-01 ok
*.williamfry.com 14 2026-04-22 2026-10-01 —
dealhub.williamfry.com 2 2026-08-18 2026-08-18 ok
cpd.williamfry.com 6 2026-06-01 2026-09-30 ok
sso.cpd.williamfry.com 5 2026-06-01 2026-09-30 ok
dashboard.williamfry.com 2 2025-09-03 2026-08-31 nxdomain
www.dashboard.williamfry.com 2 2025-09-03 2026-08-31 nxdomain
3e.williamfry.com 1 2026-06-23 2026-06-23 ok
www.3e.williamfry.com 1 2026-06-23 2026-06-23 nxdomain
3EWorkspace.williamfry.com 1 2026-06-25 2026-06-25 —
time.williamfry.com 1 2026-05-13 2026-05-13 ok
www.time.williamfry.com 1 2026-05-13 2026-05-13 nxdomain
hticompli.williamfry.com 2 2026-03-12 2026-07-05 ok
securelink.williamfry.com 5 2026-05-31 2026-09-28 ok
svrmsvpn.williamfry.com 1 2026-02-20 2026-02-20 ok
www.svrmsvpn.williamfry.com 1 2026-02-20 2026-02-20 nxdomain
careers.williamfry.com 2 2025-07-02 2026-06-02 ok
www.careers.williamfry.com 2 2025-07-02 2026-06-02 ok
mta-sts.williamfry.com 1 2025-11-23 2025-11-23 ok
hticompli-uat.williamfry.com 2 2026-03-06 2026-06-29 ok
connect.williamfry.com 45 2025-08-05 2026-10-01 ok
hticompli-dev.williamfry.com 2 2026-03-03 2026-06-26 ok
knowhow.williamfry.com 2 2026-02-19 2026-03-18 nxdomain
www.knowhow.williamfry.com 2 2026-02-19 2026-03-18 nxdomain
flow.williamfry.com 1 2025-07-16 2025-07-16 nxdomain
www.flow.williamfry.com 1 2025-07-16 2025-07-16 nxdomain
www.williamfry.com 6 2026-04-19 2026-08-15 ok
mta-sts.notify.williamfry.com 1 2025-11-30 2025-11-30 ok
seeunity.williamfry.com 1 2025-11-21 2025-11-21 nxdomain
www.seeunity.williamfry.com 1 2025-11-21 2025-11-21 nxdomain

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