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.

14 hosts · 343 ms

HostCertsFirst seenLast seenDNS
krakend.io 64 2026-04-10 2026-10-05 ok
*.krakend.io 8 2026-04-17 2026-09-25 —
www2.krakend.io 16 2026-04-11 2026-10-05 nxdomain
download.krakend.io 12 2026-05-20 2026-09-15 ok
usage.krakend.io 5 2026-04-09 2026-09-18 ok
training.krakend.io 10 2026-04-16 2026-08-12 ok
go.krakend.io 6 2026-05-14 2026-09-09 ok
*.go.krakend.io 6 2026-05-14 2026-09-09 —
repo.krakend.io 5 2026-05-20 2026-09-17 ok
services.krakend.io 4 2026-04-12 2026-08-10 ok
partners.krakend.io 4 2026-04-17 2026-08-12 ok
thesecret.krakend.io 12 2026-04-10 2026-10-04 ok
support.krakend.io 21 2026-05-19 2026-09-20 ok
trust.krakend.io 12 2026-04-14 2026-08-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/krakend.io (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/krakend.io.