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.

26 hosts · 401 ms

HostCertsFirst seenLast seenDNS
puppies.com 37 2026-01-02 2026-10-02 ok
*.puppies.com 24 2026-01-02 2026-10-02 —
b.puppies.com 9 2026-06-04 2026-09-30 ok
static.puppies.com 10 2026-05-04 2026-08-31 ok
petscape.puppies.com 1 2026-09-17 2026-09-17 ok
staging.puppies.com 2 2025-08-20 2025-08-22 ok
*.staging.puppies.com 2 2025-08-20 2025-08-22 —
uploads.staging.puppies.com 8 2026-04-24 2026-08-20 ok
breeds.staging.puppies.com 15 2026-04-09 2026-10-03 ok
images.staging.puppies.com 11 2026-05-19 2026-09-14 ok
sitemaps.staging.puppies.com 8 2026-05-05 2026-08-31 ok
blog.puppies.com 1 2026-04-20 2026-04-20 ok
uploads.local.puppies.com 8 2026-04-24 2026-08-21 ok
breeds.local.puppies.com 11 2026-04-08 2026-10-03 ok
images.local.puppies.com 11 2026-06-06 2026-10-02 ok
email-assets.local.puppies.com 4 2026-06-11 2026-08-09 ok
mcp.puppies.com 5 2026-04-17 2026-06-15 ok
uploads.puppies.com 12 2026-04-24 2026-08-20 ok
breeds.puppies.com 13 2026-06-06 2026-10-02 ok
images.puppies.com 12 2026-05-21 2026-09-16 ok
emails.puppies.com 1 2026-01-22 2026-01-22 ok
sitemaps.puppies.com 8 2026-05-05 2026-08-31 ok
email-assets.puppies.com 6 2026-06-11 2026-08-09 ok
breeder-assets.puppies.com 2 2026-09-08 2026-09-08 ok
survey.puppies.com 1 2026-08-18 2026-08-18 ok
broodly.puppies.com 1 2026-09-09 2026-09-09 ok

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