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.

20 hosts · 346 ms

HostCertsFirst seenLast seenDNS
keylight.com 31 2025-07-23 2026-09-09 ok
*.keylight.com 24 2025-07-23 2026-09-09 —
send.keylight.com 5 2026-04-29 2026-08-27 ok
keycloak-internal.playground.keylight.com 2 2026-05-08 2026-05-08 ok
login.playground.keylight.com 2 2026-04-30 2026-05-04 ok
docs.playground.keylight.com 2 2026-05-08 2026-05-08 ok
prod.keylight.com 2 2026-04-09 2026-09-09 nodata
*.prod.keylight.com 2 2026-04-09 2026-09-09 —
blog.keylight.com 6 2026-05-06 2026-09-02 ok
global.keylight.com 2 2026-04-20 2026-09-20 nodata
*.global.keylight.com 2 2026-04-20 2026-09-20 —
offers.keylight.com 6 2026-05-01 2026-08-27 ok
redirect.keylight.com 4 2025-11-03 2026-10-04 ok
support.keylight.com 5 2026-05-09 2026-09-06 ok
next.keylight.com 1 2026-10-04 2026-10-04 ok
dev.keylight.com 2 2026-02-22 2026-07-10 nodata
*.dev.keylight.com 2 2026-02-22 2026-07-10 —
www.keylight.com 12 2026-04-24 2026-08-20 ok
sbx.keylight.com 2 2026-03-09 2026-07-25 nodata
*.sbx.keylight.com 2 2026-03-09 2026-07-25 —

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