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.

6 hosts · 372 ms

HostCertsFirst seenLast seenDNS
mjunction.in 2 2026-04-15 2026-04-21 ok
*.mjunction.in 2 2026-04-15 2026-04-21 —
tracking.hello.mjunction.in 3 2026-06-12 2026-08-27 ok
services.mjunction.in 8 2026-05-07 2026-09-02 ok
www.services.mjunction.in 8 2026-05-09 2026-09-04 ok
delivery.mjunction.in 4 2026-06-02 2026-09-19 ok

Programmatic access, with DNS A records: API GET /v1/hosts/mjunction.in (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/mjunction.in.