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.

4 hosts · 302 ms

HostCertsFirst seenLast seenDNS
abhi.co 10 2026-04-14 2026-09-12 ok
*.abhi.co 6 2026-04-14 2026-09-12 —
growth.abhi.co 7 2026-05-27 2026-10-01 ok
www.abhi.co 4 2026-04-20 2026-08-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/abhi.co (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/abhi.co.