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) · 439 ms

HostCertsFirst seenLast seenDNS
alan.com 287 2025-10-22 2026-10-06 ok
*.alan.com 38 2026-04-23 2026-09-19 —
test-david-staging-2.alan.com 25 2026-04-25 2026-08-31 ok
prod2.alan.com 10 2026-04-15 2026-08-12 ok
be2.alan.com 20 2026-05-22 2026-09-17 ok
acceptance2.alan.com 14 2026-04-13 2026-10-07 ok
be-acceptance2.alan.com 10 2026-05-17 2026-09-12 ok
es-acceptance2.alan.com 15 2026-05-22 2026-09-17 ok
website2.alan.com 14 2026-04-12 2026-10-06 ok
staging2.alan.com 16 2026-05-29 2026-09-25 ok
link2.alan.com 20 2026-05-14 2026-09-09 ok
demo2.alan.com 10 2026-04-15 2026-08-11 ok
be-demo2.alan.com 21 2026-05-22 2026-09-17 ok
website-demo2.alan.com 20 2026-04-12 2026-10-07 ok
es-demo2.alan.com 20 2026-05-23 2026-09-19 ok
acceptance-fr2.alan.com 10 2026-04-14 2026-08-10 ok
es2.alan.com 21 2026-05-22 2026-09-18 ok
airflow-3.alan.com 7 2026-02-02 2026-02-05 nxdomain
ca.alan.com 20 2026-05-14 2026-09-09 ok
gtag-ca.alan.com 10 2026-04-16 2026-06-14 nxdomain
api-ca.alan.com 20 2026-05-11 2026-09-06 ok
api-noar-ca.alan.com 24 2025-09-05 2026-09-02 ok
www.api-noar-ca.alan.com 3 2025-09-05 2025-09-08 nxdomain
*.ca.alan.com 4 2026-07-08 2026-09-05 —
media.alan.com 2 2026-04-12 2026-09-12 ok
sa.alan.com 14 2026-06-16 2026-09-13 ok
metabase-sa.alan.com 6 2026-06-17 2026-08-15 ok
idp-staging-sa.alan.com 16 2026-04-27 2026-08-23 ok
api-sa.alan.com 6 2026-06-16 2026-08-14 ok
tools-api-sa.alan.com 2 2026-09-23 2026-09-23 ok
marmot-api-sa.alan.com 2 2026-09-03 2026-09-03 ok
idp-sa.alan.com 8 2026-06-15 2026-08-13 ok
nphies-sa.alan.com 2 2026-09-21 2026-09-22 ok
airflow-sa.alan.com 10 2026-05-05 2026-08-15 ok
*.sa.alan.com 4 2026-07-16 2026-09-13 —
metabase-ksa.alan.com 12 2026-05-27 2026-05-28 nxdomain
airflow-ksa.alan.com 4 2026-05-06 2026-05-06 nxdomain
external-data.alan.com 10 2026-05-04 2026-08-30 ok
avec.alan.com 12 2026-05-05 2026-08-31 ok
static.alan.com 1 2025-12-16 2025-12-16 ok
daytona-poc.alan.com 4 2026-08-25 2026-08-25 ok
*.daytona-poc.alan.com 4 2026-08-25 2026-08-25 —
airflow-poc.alan.com 4 2026-07-03 2026-07-03 nxdomain
sandbox-poc.alan.com 2 2026-08-23 2026-08-23 nodata
*.sandbox-poc.alan.com 4 2026-08-23 2026-08-23 —
dashboard.sandbox-poc.alan.com 2 2026-08-24 2026-08-24 ok
temporal-grpc.alan.com 8 2026-06-04 2026-06-04 nxdomain
hello-world.alan.com 14 2026-05-14 2026-09-09 ok
mind.alan.com 17 2026-05-24 2026-09-19 ok
link-mind.alan.com 4 2026-05-10 2026-07-25 ok
mail.mind.alan.com 1 2025-07-27 2025-07-27 nxdomain
test-david-prod.alan.com 18 2026-04-17 2026-10-03 ok
icanopee-prod.alan.com 22 2026-04-21 2026-09-14 ok
*.icanopee-prod.alan.com 4 2026-07-17 2026-09-14 —
hopper-worker-prod.alan.com 6 2026-07-29 2026-07-29 nxdomain
*.hopper-worker-prod.alan.com 2 2026-07-29 2026-07-29 —
datocms-graphql-proxy-prod.alan.com 8 2026-05-14 2026-09-09 nxdomain
api-patient-record.alan.com 2 2026-08-31 2026-08-31 ok
1password.alan.com 2 2026-04-11 2026-09-11 ok
be.alan.com 28 2026-04-20 2026-09-06 ok
gtag-be.alan.com 10 2026-04-16 2026-06-14 nxdomain
api-be.alan.com 24 2025-10-22 2026-09-02 ok
link-be.alan.com 15 2026-05-10 2026-09-05 ok
*.be.alan.com 6 2026-07-09 2026-09-06 —
help-staging.be.alan.com 6 2026-10-01 2026-10-01 ok
help.be.alan.com 18 2026-05-05 2026-10-06 ok
*.help.be.alan.com 2 2026-10-06 2026-10-06 —
typeface.alan.com 8 2026-04-18 2026-08-14 ok
acceptance.alan.com 29 2026-04-20 2026-09-13 ok
ca-acceptance.alan.com 28 2026-05-14 2026-09-10 ok
api-ca-acceptance.alan.com 14 2026-05-05 2026-08-31 ok
api-noar-ca-acceptance.alan.com 16 2025-07-29 2026-09-17 ok
www.api-noar-ca-acceptance.alan.com 3 2025-07-29 2025-07-29 nxdomain
*.ca-acceptance.alan.com 4 2026-07-08 2026-09-05 —
sa-acceptance.alan.com 18 2026-06-01 2026-09-27 ok
api-sa-acceptance.alan.com 16 2026-05-12 2026-09-07 ok
tools-api-sa-acceptance.alan.com 2 2026-09-23 2026-09-23 ok
marmot-api-sa-acceptance.alan.com 2 2026-09-03 2026-09-03 ok
nphies-sa-acceptance.alan.com 1 2026-09-21 2026-09-21 ok
*.sa-acceptance.alan.com 4 2026-07-16 2026-09-13 —
link-mind-acceptance.alan.com 4 2026-05-10 2026-07-25 ok
api-patient-record-acceptance.alan.com 9 2026-08-06 2026-10-04 ok
be-acceptance.alan.com 24 2026-05-22 2026-09-20 ok
api-be-acceptance.alan.com 20 2025-10-22 2026-09-02 ok
link-be-acceptance.alan.com 23 2026-05-11 2026-09-07 ok
*.be-acceptance.alan.com 6 2026-07-09 2026-09-06 —
metabase-acceptance.alan.com 39 2026-04-27 2026-10-02 nxdomain
website-acceptance.alan.com 16 2026-04-20 2026-08-17 ok
api-acceptance.alan.com 15 2026-04-21 2026-08-17 ok
marmot-api-acceptance.alan.com 16 2026-04-25 2026-08-21 ok
link-acceptance.alan.com 15 2026-05-11 2026-09-06 ok
idp-acceptance.alan.com 14 2026-04-15 2026-08-11 ok
api-noar-acceptance.alan.com 22 2025-11-25 2026-10-01 ok
www.api-noar-acceptance.alan.com 4 2025-11-25 2025-11-28 nxdomain
saleor-acceptance.alan.com 24 2026-04-12 2026-10-06 ok
*.saleor-acceptance.alan.com 2 2026-08-10 2026-08-10 —
es-acceptance.alan.com 25 2026-05-22 2026-09-18 ok
api-es-acceptance.alan.com 20 2026-04-28 2026-08-25 ok
link-es-acceptance.alan.com 22 2026-05-05 2026-10-03 ok
*.es-acceptance.alan.com 4 2026-07-09 2026-09-06 —

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/alan.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/alan.com.