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.

9 hosts · 307 ms

HostCertsFirst seenLast seenDNS
beharinsurance.com 8 2026-04-21 2026-08-28 ok
*.beharinsurance.com 8 2026-04-21 2026-08-28 —
blog.beharinsurance.com 4 2026-05-28 2026-07-28 ok
www.blog.beharinsurance.com 4 2026-05-28 2026-07-28 ok
go.beharinsurance.com 1 2026-09-02 2026-09-02 ok
mta-sts.beharinsurance.com 4 2026-04-25 2026-06-26 ok
www.mta-sts.beharinsurance.com 4 2026-04-25 2026-06-26 ok
floridasigortaciniz.beharinsurance.com 3 2026-06-03 2026-08-03 ok
www.floridasigortaciniz.beharinsurance.com 3 2026-06-03 2026-08-03 ok

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