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.

30 hosts · 312 ms

HostCertsFirst seenLast seenDNS
dirk.nl 10 2025-06-26 2026-05-27 ok
*.dirk.nl 10 2025-06-26 2026-05-27 —
d-ica.dirk.nl 1 2025-07-31 2025-07-31 nxdomain
api-acc.dirk.nl 1 2026-09-25 2026-09-25 nxdomain
invoer-app-acc.dirk.nl 1 2026-04-24 2026-04-24 ok
api-prd.dirk.nl 1 2026-09-25 2026-09-25 nxdomain
zsprd.dirk.nl 1 2026-09-30 2026-09-30 nxdomain
e.dirk.nl 4 2026-04-18 2026-08-16 ok
share.dirk.nl 1 2025-11-07 2025-11-07 ok
snakeware.dirk.nl 1 2025-11-24 2025-11-24 nodata
*.snakeware.dirk.nl 1 2025-11-24 2025-11-24 —
onbase.dirk.nl 1 2026-09-28 2026-09-28 nxdomain
local.dirk.nl 2 2025-12-04 2025-12-04 nxdomain
*.local.dirk.nl 2 2025-12-04 2025-12-04 —
vpn.dirk.nl 1 2026-05-20 2026-05-20 ok
magicinfo.dirk.nl 1 2026-06-02 2026-06-02 ok
d-ica-accp.dirk.nl 1 2025-07-31 2025-07-31 nxdomain
bass-accp.dirk.nl 2 2025-08-04 2026-07-27 ok
invoer-app.dirk.nl 1 2026-04-24 2026-04-24 ok
folder.dirk.nl 2 2025-07-09 2026-06-08 ok
verticale-folder.dirk.nl 2 2025-09-05 2026-08-06 ok
bass.dirk.nl 2 2025-08-04 2026-07-27 ok
tijdschrift.dirk.nl 1 2026-01-20 2026-01-20 ok
mymanagement.dirk.nl 1 2026-09-30 2026-09-30 nxdomain
d-ica-test.dirk.nl 1 2025-07-31 2025-07-31 nxdomain
api-tst.dirk.nl 3 2026-02-25 2026-09-25 ok
zstst.dirk.nl 1 2026-09-30 2026-09-30 nxdomain
mymanagementtst.dirk.nl 1 2026-09-30 2026-09-30 nxdomain
academy.dirk.nl 1 2026-09-23 2026-09-23 ok
staging.academy.dirk.nl 1 2026-09-23 2026-09-23 ok

Programmatic access, with DNS A records: API GET /v1/hosts/dirk.nl (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/dirk.nl.