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.

10 hosts · 291 ms

HostCertsFirst seenLast seenDNS
brandcrowd.com 10 2025-07-31 2026-07-25 ok
*.brandcrowd.com 10 2025-07-31 2026-07-25 —
url752.brandcrowd.com 2 2025-09-07 2026-08-08 ok
28640114.brandcrowd.com 2 2025-09-07 2026-08-08 ok
send.brandcrowd.com 2 2025-09-07 2026-08-08 ok
staging-blog.brandcrowd.com 5 2026-05-29 2026-05-29 ok
*.staging-blog.brandcrowd.com 5 2026-05-29 2026-05-29 —
auth.brandcrowd.com 10 2026-04-29 2026-08-25 ok
ablink.hello.brandcrowd.com 2 2025-09-07 2026-08-08 ok
sms.brandcrowd.com 5 2026-05-01 2026-08-27 ok

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