Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

60 hosts · 298 ms

HostCertsFirst seenLast seen
themarketer.com 22 2026-04-18 2026-09-25
*.themarketer.com 16 2026-04-18 2026-09-17
cdn1.themarketer.com 10 2026-05-18 2026-09-24
s3.themarketer.com 1 2026-08-31 2026-08-31
sa.themarketer.com 5 2026-05-26 2026-09-23
api-sa.themarketer.com 5 2026-05-28 2026-09-25
queue.themarketer.com 4 2026-06-09 2026-10-08
staging.themarketer.com 5 2026-04-19 2026-09-23
cdn1.staging.themarketer.com 4 2026-04-19 2026-08-17
tracking.staging.themarketer.com 4 2026-04-19 2026-08-17
api.staging.themarketer.com 5 2026-04-19 2026-09-23
tracking.themarketer.com 3 2026-06-18 2026-08-17
testing.themarketer.com 9 2026-04-16 2026-09-20
website-testing.themarketer.com 5 2026-05-23 2026-09-20
cdn1.testing.themarketer.com 4 2026-04-17 2026-08-15
sa.testing.themarketer.com 4 2026-04-16 2026-08-14
api-sa.testing.themarketer.com 4 2026-04-17 2026-08-15
tracking.testing.themarketer.com 4 2026-04-17 2026-08-15
api.testing.themarketer.com 4 2026-04-17 2026-08-15
blog.themarketer.com 5 2026-04-22 2026-08-21
auth.themarketer.com 3 2026-06-17 2026-08-16
api.themarketer.com 10 2026-05-26 2026-09-24
partners-api.themarketer.com 5 2026-05-10 2026-09-08
c1api.themarketer.com 15 2026-04-30 2026-09-05
c2api.themarketer.com 30 2026-05-08 2026-09-08
c3api.themarketer.com 19 2026-05-16 2026-10-06
c4api.themarketer.com 12 2026-06-08 2026-10-06
c5api.themarketer.com 12 2026-04-13 2026-08-12
c6api.themarketer.com 12 2026-04-13 2026-08-12
capi.themarketer.com 27 2026-04-13 2026-10-06
notification.themarketer.com 3 2026-06-18 2026-08-17
minio.themarketer.com 3 2026-06-17 2026-08-16
demo.themarketer.com 8 2026-04-19 2026-08-19
mcp.themarketer.com 1 2026-06-12 2026-06-12
app.themarketer.com 10 2026-04-26 2026-09-22
pusher.themarketer.com 3 2026-06-17 2026-08-16
connector.themarketer.com 5 2026-05-03 2026-09-01
mktr.themarketer.com 10 2026-05-26 2026-09-24
sales.themarketer.com 4 2026-03-09 2026-08-19
api.dev.sales.themarketer.com 1 2026-02-24 2026-02-24
pdns.themarketer.com 2 2026-06-30 2026-06-30
partners.themarketer.com 10 2026-03-12 2026-09-08
*.partners.themarketer.com 3 2026-03-12 2026-06-04
static.partners.themarketer.com 1 2026-06-04 2026-06-04
api.partners.themarketer.com 2 2026-03-06 2026-06-04
agent.partners.themarketer.com 1 2026-06-04 2026-06-04
dev.partners.themarketer.com 3 2026-04-21 2026-05-21
*.dev.partners.themarketer.com 2 2026-04-21 2026-05-21
static.dev.partners.themarketer.com 2 2026-05-05 2026-06-01
dashboard.dev.partners.themarketer.com 4 2026-01-21 2026-03-17
*.dashboard.dev.partners.themarketer.com 2 2026-01-22 2026-03-17
api.dev.partners.themarketer.com 1 2026-02-03 2026-02-03
agent.dev.partners.themarketer.com 3 2026-05-04 2026-05-11
developers.themarketer.com 12 2026-05-09 2026-09-05
t.themarketer.com 20 2026-05-01 2026-08-30
obs-direct.themarketer.com 5 2026-04-25 2026-08-24
mailpit.themarketer.com 3 2026-06-17 2026-08-16
www.themarketer.com 5 2026-05-27 2026-09-25
api-www.themarketer.com 5 2026-05-27 2026-09-25
academy.themarketer.com 4 2026-04-18 2026-08-17

Programmatic access: API GET /v1/hosts/themarketer.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/themarketer.com.