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.

17 hosts · 312 ms

HostCertsFirst seenLast seenDNS
bobbies.com 42 2026-03-11 2026-09-30 ok
*.bobbies.com 48 2025-07-07 2026-09-30 —
*.preprod.bobbies.com 14 2026-03-11 2026-08-24 —
wholesale.bobbies.com 1 2025-12-08 2025-12-08 ok
printer1.pos.intern.bobbies.com 1 2026-05-09 2026-05-09 nxdomain
www.printer1.pos.intern.bobbies.com 1 2026-05-09 2026-05-09 nxdomain
printer2.pos.intern.bobbies.com 1 2026-05-09 2026-05-09 nxdomain
printer3.pos.intern.bobbies.com 1 2026-05-09 2026-05-09 nxdomain
h.hello.bobbies.com 10 2026-04-18 2026-08-14 ok
t.hello.bobbies.com 5 2026-06-02 2026-08-01 ok
help.bobbies.com 13 2026-05-24 2026-09-19 ok
images.bobbies.com 2 2026-02-25 2026-07-13 ok
business.bobbies.com 10 2026-04-26 2026-08-22 ok
mta-sts.bobbies.com 5 2026-05-05 2026-09-02 ok
*.eks-preview.bobbies.com 2 2026-08-23 2026-08-23 —
*.preview.bobbies.com 4 2026-08-24 2026-08-24 —
cf-workers-sandbox.bobbies.com 5 2026-05-12 2026-09-09 ok

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