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.

46 hosts · 355 ms

HostCertsFirst seenLast seenDNS
strato.com 3 2025-07-18 2026-07-07 ok
*.strato.com 3 2025-07-18 2026-07-07 —
pop3.strato.com 1 2026-01-13 2026-01-13 ok
com4.strato.com 1 2026-01-14 2026-01-14 ok
oc.strato.com 1 2026-08-31 2026-08-31 —
id.strato.com 3 2026-05-05 2026-05-05 ok
presence.strato.com 1 2026-05-04 2026-05-04 ok
hidrive.strato.com 1 2025-12-09 2025-12-09 ok
s3.hidrive.strato.com 1 2025-12-09 2025-12-09 ok
*.s3.hidrive.strato.com 1 2025-12-09 2025-12-09 —
provisioning.hidrive.strato.com 2 2025-09-23 2026-09-16 ok
www.provisioning.hidrive.strato.com 2 2025-09-23 2026-09-16 nxdomain
api.hidrive.strato.com 1 2026-04-01 2026-04-01 ok
www.api.hidrive.strato.com 1 2026-04-01 2026-04-01 nxdomain
ftp.hidrive.strato.com 1 2025-12-09 2025-12-09 ok
www.ftp.hidrive.strato.com 1 2025-12-09 2025-12-09 nxdomain
webdav.hidrive.strato.com 1 2025-12-08 2025-12-08 ok
*.webdav.hidrive.strato.com 1 2025-12-08 2025-12-08 —
www.hidrive.strato.com 1 2025-12-09 2025-12-09 ok
mx.hidrive.strato.com 1 2026-01-13 2026-01-13 ok
webmail.strato.com 1 2026-01-14 2026-01-14 ok
share.webmail.strato.com 1 2026-01-14 2026-01-14 nxdomain
dav.webmail.strato.com 1 2026-01-14 2026-01-14 ok
acronis-repo.strato.com 1 2026-03-03 2026-03-03 nxdomain
imap.strato.com 1 2026-01-13 2026-01-13 ok
shop.strato.com 2 2025-09-02 2026-08-21 ok
*.shop.strato.com 2 2025-09-02 2026-08-21 —
smtp.strato.com 1 2026-01-13 2026-01-13 ok
backup.strato.com 1 2026-03-03 2026-03-03 ok
bc-backup.strato.com 1 2026-03-03 2026-03-03 ok
mc-backup.strato.com 1 2026-03-03 2026-03-03 ok
agents-mc-backup.strato.com 1 2026-03-03 2026-03-03 ok
wr-backup.strato.com 1 2026-03-03 2026-03-03 ok
registrar.strato.com 1 2026-05-15 2026-05-15 ok
www.registrar.strato.com 1 2026-05-15 2026-05-15 nxdomain
sitebuilder.strato.com 1 2026-05-04 2026-05-04 ok
communicator.strato.com 1 2026-01-14 2026-01-14 ok
share.communicator.strato.com 1 2026-01-14 2026-01-14 nxdomain
dav.communicator.strato.com 1 2026-01-14 2026-01-14 ok
templates.strato.com 1 2026-05-04 2026-05-04 ok
news.strato.com 4 2026-04-12 2026-08-10 ok
pop3.test.strato.com 1 2026-02-20 2026-02-20 ok
imap.test.strato.com 1 2026-02-20 2026-02-20 ok
smtp.test.strato.com 1 2026-03-04 2026-03-04 ok
ep7test.strato.com 3 2025-09-05 2026-08-25 ok
*.ep7test.strato.com 3 2025-09-05 2026-08-25 —

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