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.

13 hosts · 313 ms

HostCertsFirst seenLast seenDNS
268generation.com 25 2026-05-07 2026-10-01 ok
*.268generation.com 21 2026-05-07 2026-10-01 —
media.268generation.com 4 2026-04-21 2026-10-05 ok
live.268generation.com 5 2026-05-18 2026-09-15 ok
mktg.268generation.com 7 2026-04-30 2026-08-12 ok
notify.mktg.268generation.com 6 2026-04-26 2026-07-16 nxdomain
*.notify.mktg.268generation.com 6 2026-04-26 2026-07-16 —
passioncamp.268generation.com 2 2026-05-31 2026-05-31 ok
staging.passioncamp.268generation.com 2 2026-05-11 2026-05-11 ok
dh.passioncamp.268generation.com 4 2026-04-17 2026-09-04 ok
scholarships.268generation.com 1 2026-04-20 2026-04-20 ok
events.268generation.com 4 2026-04-13 2026-08-31 ok
www.268generation.com 4 2026-06-17 2026-06-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/268generation.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/268generation.com.