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.

100 hosts (first page) · 409 ms

HostCertsFirst seenLast seenDNS
one.com 13 2026-04-09 2026-09-24 ok
*.one.com 5 2026-05-18 2026-09-24 —
icscache-01.one.com 5 2026-05-12 2026-09-09 ok
ns01.one.com 5 2026-05-18 2026-09-24 ok
wsb-couchdb1.one.com 5 2026-04-28 2026-09-07 ok
service.pub.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
rabbitmq.control.vps1-lej1.one.com 3 2026-06-05 2026-08-07 ok
vps1lej1-stor1.env.vps1-lej1.one.com 5 2026-05-18 2026-09-24 ok
prometheus1.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
vps1lej1-stor2.env.vps1-lej1.one.com 5 2026-05-18 2026-09-24 ok
prometheus2.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
octavia.env.vps1-lej1.one.com 5 2026-04-28 2026-09-07 ok
manila.env.vps1-lej1.one.com 5 2026-04-28 2026-09-07 ok
lb.env.vps1-lej1.one.com 4 2026-04-07 2026-08-13 ok
*.lb.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
memcached.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
*.memcached.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
glance.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
*.glance.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
keystone.env.vps1-lej1.one.com 4 2026-04-07 2026-08-13 ok
*.keystone.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
designate.env.vps1-lej1.one.com 5 2026-05-18 2026-09-24 ok
*.compute.env.vps1-lej1.one.com 4 2026-04-09 2026-08-20 —
logstash.env.vps1-lej1.one.com 4 2026-04-07 2026-08-13 ok
*.network.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
mysql.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
*.mysql.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
novactl.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
*.novactl.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
neutronctl.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
*.neutronctl.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
cinderctl.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
*.cinderctl.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
barbican.env.vps1-lej1.one.com 5 2026-05-18 2026-09-24 ok
horizon.env.vps1-lej1.one.com 4 2026-04-07 2026-08-13 ok
*.horizon.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
rabbitmq.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
*.rabbitmq.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 —
vps1lej1-stor.env.vps1-lej1.one.com 5 2026-05-18 2026-09-24 ok
gobs.env.vps1-lej1.one.com 4 2026-04-07 2026-08-10 ok
service.pub.vps2-lej1.one.com 4 2026-04-07 2026-08-10 ok
rabbitmq.control.vps2-lej1.one.com 3 2026-06-05 2026-08-07 ok
vps2lej1-stor1.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 ok
prometheus1.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 ok
vps2lej1-stor2.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 ok
prometheus2.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 ok
octavia.env.vps2-lej1.one.com 5 2026-04-28 2026-09-07 ok
manila.env.vps2-lej1.one.com 5 2026-04-28 2026-09-07 ok
lb.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
memcached.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
glance.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
keystone.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
designate.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
*.compute.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 —
logstash.env.vps2-lej1.one.com 4 2026-04-07 2026-08-13 ok
*.network.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 —
mysql.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
novactl.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
neutronctl.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
cinderctl.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
barbican.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
horizon.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
rabbitmq.env.vps2-lej1.one.com 5 2026-05-18 2026-09-24 ok
vps2lej1-stor.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 ok
gobs.env.vps2-lej1.one.com 4 2026-04-07 2026-08-10 ok
service.pub.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
rabbitmq.control.vps3-lej1.one.com 3 2026-06-05 2026-08-07 ok
vps3lej1-stor1.env.vps3-lej1.one.com 5 2026-04-28 2026-09-07 ok
prometheus1.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
vps3lej1-stor2.env.vps3-lej1.one.com 5 2026-04-28 2026-09-07 ok
prometheus2.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
octavia.env.vps3-lej1.one.com 5 2026-04-28 2026-09-07 ok
manila.env.vps3-lej1.one.com 5 2026-04-28 2026-09-07 ok
lb.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
memcached.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
glance.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
keystone.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
designate.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
logstash.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
*.network.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 —
mysql.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
novactl.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
neutronctl.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
cinderctl.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
barbican.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
horizon.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
rabbitmq.env.vps3-lej1.one.com 5 2026-05-18 2026-09-24 ok
vps3lej1-stor.env.vps3-lej1.one.com 5 2026-04-28 2026-09-07 ok
gobs.env.vps3-lej1.one.com 4 2026-04-07 2026-08-13 ok
service.pub.webpod1-osl1.one.com 4 2026-04-07 2026-08-10 ok
prometheus1.prv.webpod1-osl1.one.com 4 2026-04-07 2026-08-10 ok
prometheus2.prv.webpod1-osl1.one.com 4 2026-04-07 2026-08-10 ok
mx1.pub.mailpod1-osl1.one.com 5 2026-04-28 2026-09-07 ok
mx2.pub.mailpod1-osl1.one.com 5 2026-04-28 2026-09-07 ok
mx3.pub.mailpod1-osl1.one.com 5 2026-04-28 2026-09-07 ok
service.pub.mailpod1-osl1.one.com 4 2026-04-07 2026-08-10 ok
mx1-proisp-no.pub.mailpod1-osl1.one.com 5 2026-04-28 2026-09-07 ok
mx2-proisp-no.pub.mailpod1-osl1.one.com 5 2026-04-28 2026-09-07 ok
mx3-proisp-no.pub.mailpod1-osl1.one.com 5 2026-04-28 2026-09-07 ok
lookup1.prv.mailpod1-osl1.one.com 4 2026-04-07 2026-08-13 ok

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/one.com.

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/one.com.