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.

38 hosts · 365 ms

HostCertsFirst seenLast seenDNS
porta.de 11 2025-10-06 2026-09-22 ok
*.porta.de 6 2025-10-06 2026-08-22 —
sap01.porta.de 1 2025-10-24 2025-10-24 nxdomain
www.sap01.porta.de 1 2025-10-24 2025-10-24 nxdomain
scim2.porta.de 1 2025-11-03 2025-11-03 ok
www.scim2.porta.de 1 2025-11-03 2025-11-03 nxdomain
ftp2.porta.de 2 2025-10-13 2026-09-14 ok
www.ftp2.porta.de 2 2025-10-13 2026-09-14 nxdomain
github.porta.de 5 2026-04-27 2026-08-26 ok
service.porta.de 5 2026-05-15 2026-09-12 ok
xcrbridge.porta.de 2 2025-11-06 2025-11-07 ok
www.xcrbridge.porta.de 2 2025-11-06 2025-11-07 nxdomain
kueche.porta.de 14 2026-04-09 2026-10-04 ok
share.porta.de 1 2025-10-23 2025-10-23 ok
www.share.porta.de 1 2025-10-23 2025-10-23 nxdomain
dsms-core.porta.de 4 2026-06-06 2026-10-04 ok
kuechenberatung-zuhause.porta.de 10 2026-05-03 2026-08-30 ok
remote.porta.de 1 2025-10-23 2025-10-23 ok
www.remote.porta.de 1 2025-10-23 2025-10-23 nxdomain
marketing.porta.de 5 2026-04-26 2026-08-24 ok
jwvlli.porta.de 4 2026-05-17 2026-10-03 ok
see-api.porta.de 1 2026-05-13 2026-05-13 ok
www.see-api.porta.de 1 2026-05-13 2026-05-13 nxdomain
servicemail.porta.de 5 2026-04-26 2026-08-24 ok
registration.porta.de 5 2026-04-26 2026-08-24 ok
extern.porta.de 1 2025-11-03 2025-11-03 ok
www.extern.porta.de 1 2025-11-03 2025-11-03 nxdomain
ausliefapp.porta.de 1 2025-10-28 2025-10-28 nodata
*.ausliefapp.porta.de 1 2025-10-28 2025-10-28 —
qr.porta.de 1 2025-12-30 2025-12-30 ok
dsms.porta.de 4 2026-06-06 2026-10-04 ok
gtms.porta.de 3 2026-05-19 2026-09-04 ok
scim2-test.porta.de 2 2025-11-04 2025-11-05 ok
www.scim2-test.porta.de 2 2025-11-04 2025-11-05 nxdomain
see-api-test.porta.de 1 2026-05-13 2026-05-13 ok
www.see-api-test.porta.de 1 2026-05-13 2026-05-13 nxdomain
inventory.porta.de 1 2025-10-22 2025-10-22 ok
www.inventory.porta.de 1 2025-10-22 2025-10-22 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/porta.de (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/porta.de.