Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

8 hosts · 260 ms

HostCertsFirst seenLast seen
agiliosoftware.nl 21 2025-12-18 2026-10-08
*.agiliosoftware.nl 15 2026-05-23 2026-09-19
cloud.mail.agiliosoftware.nl 2 2026-04-04 2026-09-07
image.mail.agiliosoftware.nl 3 2026-02-04 2026-09-25
click.mail.agiliosoftware.nl 2 2026-04-04 2026-09-07
view.mail.agiliosoftware.nl 2 2026-04-04 2026-09-05
vragenlijsten.agiliosoftware.nl 2 2026-08-21 2026-08-21
www.agiliosoftware.nl 6 2025-12-18 2026-10-08

Programmatic access: API GET /v1/hosts/agiliosoftware.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/agiliosoftware.nl.