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.

7 hosts · 265 ms

HostCertsFirst seenLast seenDNS
polycab.com 26 2025-06-26 2026-09-30 ok
*.polycab.com 26 2025-06-26 2026-09-30 —
mbg2.polycab.com 1 2026-08-04 2026-08-04 ok
link.polycab.com 5 2026-05-26 2026-09-23 ok
authorized-dealers.polycab.com 3 2026-08-19 2026-08-27 nxdomain
iot.polycab.com 5 2026-05-11 2026-09-10 ok
marketingrepository.polycab.com 3 2026-02-14 2026-09-28 ok

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