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.

8 hosts · 273 ms

HostCertsFirst seenLast seenDNS
negosh.com 15 2026-05-01 2026-10-03 ok
*.negosh.com 15 2026-05-01 2026-10-03 —
meet2.negosh.com 3 2026-04-25 2026-08-23 ok
static.negosh.com 6 2026-04-16 2026-08-12 ok
secrets.negosh.com 3 2026-09-08 2026-09-08 ok
payments.negosh.com 12 2026-04-22 2026-08-18 ok
static-development.negosh.com 11 2026-04-17 2026-08-13 ok
survey.negosh.com 1 2026-09-17 2026-09-17 ok

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