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 · 362 ms

HostCertsFirst seenLast seenDNS
hello.axaxl.com 1 2026-05-13 2026-05-13 ok
app.hello.axaxl.com 1 2026-05-13 2026-05-13 ok
analytics.hello.axaxl.com 1 2026-05-13 2026-05-13 ok
images.hello.axaxl.com 1 2025-11-25 2025-11-25 ok
www.images.hello.axaxl.com 1 2025-11-25 2025-11-25 nxdomain
pages.hello.axaxl.com 2 2026-05-13 2026-05-13 ok
app.pages.hello.axaxl.com 1 2026-05-13 2026-05-13 nxdomain
www.pages.hello.axaxl.com 1 2026-05-13 2026-05-13 nxdomain

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