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.

11 hosts · 261 ms

HostCertsFirst seenLast seenDNS
cymbiotika.com 18 2026-05-17 2026-09-27 ok
data.cymbiotika.com 1 2026-09-11 2026-09-11 ok
load.data.cymbiotika.com 4 2026-09-11 2026-09-23 ok
tlrtd.cymbiotika.com 10 2026-05-03 2026-08-29 ok
wholesale.cymbiotika.com 16 2026-05-21 2026-10-01 ok
i.cymbiotika.com 7 2026-05-17 2026-09-16 ok
trk.cymbiotika.com 7 2026-06-21 2026-09-29 ok
qr.cymbiotika.com 4 2026-05-23 2026-07-31 ok
partners.cymbiotika.com 6 2026-05-30 2026-10-04 ok
www.cymbiotika.com 14 2026-05-17 2026-10-03 ok
try.cymbiotika.com 4 2026-04-23 2026-07-22 ok

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