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.

8 hosts · 268 ms

HostCertsFirst seenLast seenDNS
weldbend.com 5 2026-05-18 2026-09-06 ok
*.weldbend.com 4 2026-04-27 2026-07-23 —
report-gen.weldbend.com 5 2026-05-20 2026-09-07 ok
mtr.weldbend.com 5 2026-05-18 2026-09-06 ok
rewards.weldbend.com 5 2026-05-18 2026-09-06 ok
mtr-test.weldbend.com 5 2026-05-18 2026-09-06 ok
www.weldbend.com 5 2026-05-18 2026-09-06 ok
traceability.weldbend.com 5 2026-05-18 2026-09-06 ok

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