Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

9 hosts · 234 ms

HostCertsFirst seenLast seen
lighterusa.com 11 2026-05-16 2026-08-31
beta.lighterusa.com 3 2026-07-01 2026-07-27
api.beta.lighterusa.com 2 2026-07-01 2026-07-01
cf-origin.beta.lighterusa.com 1 2026-07-01 2026-07-01
wholesale.lighterusa.com 14 2026-05-23 2026-10-03
api.lighterusa.com 2 2026-07-27 2026-08-31
cf-origin.lighterusa.com 2 2026-07-27 2026-08-31
account.lighterusa.com 13 2026-05-29 2026-10-08
www.lighterusa.com 10 2026-05-31 2026-08-31

Programmatic access: API GET /v1/hosts/lighterusa.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/lighterusa.com.