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.

9 hosts · 311 ms

HostCertsFirst seenLast seenDNS
fly-tech.de 5 2026-04-22 2026-08-19 ok
*.fly-tech.de 1 2025-12-19 2025-12-19 —
magazin.fly-tech.de 7 2026-04-24 2026-09-22 ok
shop.fly-tech.de 13 2026-05-09 2026-09-07 ok
zas.fly-tech.de 5 2026-05-13 2026-09-09 ok
mta-sts.fly-tech.de 5 2026-05-17 2026-09-17 ok
contact.fly-tech.de 73 2025-06-20 2026-06-01 ok
ftsystemmanagement.fly-tech.de 10 2026-04-23 2026-08-19 ok
www.fly-tech.de 5 2026-04-22 2026-08-19 ok

Programmatic access, with DNS A records: API GET /v1/hosts/fly-tech.de (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/fly-tech.de.