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.

15 hosts · 281 ms

HostCertsFirst seenLast seenDNS
transfeero.com 40 2026-01-15 2026-09-17 ok
*.transfeero.com 35 2026-01-15 2026-09-17 —
cloud-eu-central-03.transfeero.com 241 2026-04-07 2026-08-09 ok
internkb.transfeero.com 5 2026-05-09 2026-09-06 ok
marketing.transfeero.com 6 2026-06-03 2026-10-01 ok
cloud-eu-central.transfeero.com 4 2026-04-30 2026-06-29 ok
help.transfeero.com 3 2026-07-25 2026-09-23 ok
partner-help.transfeero.com 3 2026-07-30 2026-09-28 ok
cloud-datacenter.transfeero.com 4 2026-04-30 2026-06-29 ok
wserver.transfeero.com 5 2026-04-30 2026-08-28 ok
sqs.transfeero.com 6 2026-05-09 2026-09-04 ok
press.transfeero.com 4 2026-04-15 2026-08-13 ok
status.transfeero.com 5 2026-04-29 2026-08-27 ok
main-status.transfeero.com 5 2026-04-28 2026-08-27 ok
upsert.transfeero.com 10 2026-04-22 2026-08-20 ok

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