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.

5 hosts · 296 ms

HostCertsFirst seenLast seenDNS
image.mail.nirpl.com 2 2025-08-23 2026-09-10 ok
Webpos.nirpl.com 2 2026-07-22 2026-07-24 —
www.Webpos.nirpl.com 2 2026-07-22 2026-07-24 —
webpos.nirpl.com 1 2025-07-02 2025-07-02 —
www.webpos.nirpl.com 1 2025-07-02 2025-07-02 nxdomain

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