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.

29 hosts · 304 ms

HostCertsFirst seenLast seenDNS
ionblade.com 38 2026-04-16 2026-09-17 ok
*.ionblade.com 28 2026-04-16 2026-09-17 —
host10.ionblade.com 5 2026-05-08 2026-09-06 ok
host20.ionblade.com 3 2026-06-09 2026-08-09 ok
host30.ionblade.com 3 2026-07-29 2026-09-28 ok
host11.ionblade.com 5 2026-04-22 2026-08-20 ok
host12.ionblade.com 5 2026-05-30 2026-09-28 ok
host3.ionblade.com 5 2026-04-26 2026-08-26 ok
host4.ionblade.com 5 2026-05-19 2026-09-17 ok
host5.ionblade.com 5 2026-05-02 2026-08-31 ok
host6.ionblade.com 5 2026-04-27 2026-08-26 ok
host7.ionblade.com 5 2026-04-26 2026-08-25 ok
host8.ionblade.com 4 2026-06-08 2026-10-07 ok
host9.ionblade.com 5 2026-06-04 2026-10-03 ok
nova.ionblade.com 13 2026-04-24 2026-08-20 ok
admin-nova.ionblade.com 2 2026-04-28 2026-04-28 ok
admin.nova.ionblade.com 2 2026-04-28 2026-04-28 nxdomain
uc.ionblade.com 15 2026-04-28 2026-08-28 ok
www.uc.ionblade.com 15 2026-04-28 2026-08-28 ok
send.ionblade.com 11 2026-05-04 2026-09-26 ok
manage.ionblade.com 10 2026-04-28 2026-08-24 ok
www.manage.ionblade.com 10 2026-04-28 2026-08-24 ok
sirene.ionblade.com 10 2026-04-28 2026-08-25 ok
blog.ionblade.com 15 2026-04-28 2026-08-28 ok
www.blog.ionblade.com 15 2026-04-28 2026-08-28 ok
hydrol.ionblade.com 10 2026-04-28 2026-08-24 ok
preview.ionblade.com 12 2026-04-28 2026-08-20 ok
*.preview.ionblade.com 12 2026-04-28 2026-08-20 —
www.ionblade.com 10 2026-04-28 2026-08-24 ok

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