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.

24 hosts · 371 ms

HostCertsFirst seenLast seenDNS
shmarinas.com 34 2025-06-30 2026-09-26 ok
*.shmarinas.com 34 2025-06-30 2026-09-26 —
mfa.shmarinas.com 1 2026-06-30 2026-06-30 ok
marketplace.shmarinas.com 16 2026-05-30 2026-09-25 ok
safesource.shmarinas.com 3 2026-02-21 2026-10-05 ok
bridge.shmarinas.com 1 2026-06-30 2026-06-30 ok
porthole.shmarinas.com 10 2026-05-14 2026-09-09 ok
nme.shmarinas.com 1 2026-09-03 2026-09-03 ok
training.shmarinas.com 3 2026-07-12 2026-09-25 ok
ehs.training.shmarinas.com 3 2026-07-12 2026-09-25 ok
www.training.shmarinas.com 3 2026-07-12 2026-09-25 ok
vxg.shmarinas.com 5 2026-07-01 2026-08-30 nxdomain
unifi.shmarinas.com 5 2026-07-01 2026-09-22 ok
tdapi.shmarinas.com 5 2026-05-17 2026-09-16 ok
link.shmarinas.com 5 2026-05-30 2026-09-27 ok
portal.shmarinas.com 18 2026-05-07 2026-09-10 ok
portol.shmarinas.com 20 2026-05-14 2026-09-10 ok
vpn.shmarinas.com 2 2026-04-20 2026-04-20 ok
duo.shmarinas.com 1 2026-06-30 2026-06-30 ok
shm-uisp.shmarinas.com 5 2026-07-01 2026-09-21 nxdomain
forms.shmarinas.com 1 2026-06-30 2026-06-30 ok
mta-sts.shmarinas.com 6 2026-05-05 2026-09-02 ok
support.shmarinas.com 6 2026-05-04 2026-09-01 ok
netbox.shmarinas.com 3 2026-07-01 2026-08-30 nxdomain

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