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.

61 hosts · 482 ms

HostCertsFirst seenLast seenDNS
350.org 31 2026-04-23 2026-09-18 ok
*.350.org 15 2026-04-25 2026-09-18 —
co2.350.org 7 2026-04-25 2026-10-02 ok
southasia.350.org 15 2026-05-03 2026-08-29 ok
sa.350.org 6 2026-04-12 2026-09-01 ok
hub.350.org 3 2026-05-08 2026-08-23 ok
pacific.350.org 4 2026-05-09 2026-05-09 nxdomain
embed.350.org 2 2026-04-27 2026-04-27 nxdomain
world.350.org 17 2026-05-03 2026-08-29 ok
playground.350.org 2 2026-04-27 2026-04-27 ok
baseline.350.org 14 2026-05-20 2026-09-15 ok
offline.350.org 1 2026-04-19 2026-04-19 nxdomain
share.350.org 2 2026-04-30 2026-04-30 nxdomain
metabase.350.org 7 2026-06-02 2026-10-01 ok
heatwave.350.org 6 2026-04-28 2026-05-03 nxdomain
giving.350.org 6 2026-05-04 2026-08-30 ok
network.350.org 8 2026-05-09 2026-05-09 nxdomain
giving-global.350.org 8 2026-04-26 2026-08-22 ok
cisionone-email.350.org 4 2026-04-16 2026-08-14 ok
wagtail.350.org 1 2026-08-04 2026-08-04 ok
designsystem.350.org 5 2026-05-30 2026-09-28 ok
n8n.350.org 5 2026-05-27 2026-09-25 ok
test.n8n.350.org 1 2026-04-11 2026-04-11 nxdomain
go.350.org 1 2026-04-21 2026-04-21 nxdomain
to.350.org 5 2026-04-24 2026-08-23 ok
map.350.org 5 2026-04-22 2026-08-22 ok
new-map.350.org 1 2026-01-29 2026-01-29 nxdomain
shortener.350.org 7 2026-05-30 2026-09-25 ok
gucver.350.org 18 2026-04-24 2026-09-30 ok
email-creator.350.org 2 2026-05-06 2026-05-06 ok
campaignmonitor.350.org 10 2026-05-26 2026-05-26 ok
stories.350.org 13 2026-05-20 2026-09-15 ok
trainings.350.org 21 2026-04-22 2026-08-18 ok
id.trainings.350.org 12 2026-04-22 2026-08-19 ok
de.trainings.350.org 14 2026-04-22 2026-08-19 ok
zh.trainings.350.org 4 2026-04-22 2026-04-22 ok
nl.trainings.350.org 10 2026-04-22 2026-08-18 ok
ar.trainings.350.org 8 2026-04-23 2026-04-23 ok
fr.trainings.350.org 10 2026-04-22 2026-08-18 ok
tr.trainings.350.org 20 2026-04-22 2026-08-19 ok
es.trainings.350.org 16 2026-04-22 2026-08-18 ok
default.trainings.350.org 16 2026-04-22 2026-08-19 ok
pt.trainings.350.org 10 2026-04-22 2026-08-19 ok
ru.trainings.350.org 4 2026-04-22 2026-04-22 ok
sv.trainings.350.org 4 2026-04-22 2026-04-22 ok
www.trainings.350.org 14 2026-04-10 2026-10-04 ok
campaigns.350.org 25 2026-04-24 2026-09-30 ok
workshops.350.org 19 2026-04-22 2026-08-18 ok
satispress.350.org 5 2026-04-27 2026-08-25 ok
jira.projects.350.org 2 2026-04-01 2026-09-01 ok
confluence.projects.350.org 2 2026-04-01 2026-09-01 ok
experiments.350.org 4 2026-06-08 2026-10-06 ok
web-components.350.org 2 2026-05-03 2026-05-03 nxdomain
status.350.org 5 2026-04-26 2026-08-26 ok
groupstatus.350.org 5 2026-04-27 2026-08-25 ok
act.350.org 39 2026-04-21 2026-10-06 ok
opt.350.org 1 2026-05-03 2026-05-03 nodata
dev.350.org 16 2026-04-23 2026-08-19 ok
www.350.org 10 2026-04-22 2026-08-18 ok
community.350.org 20 2026-04-24 2026-09-23 ok
quiz.350.org 1 2026-08-07 2026-08-07 ok

Programmatic access, with DNS A records: API GET /v1/hosts/350.org (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/350.org.