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.

15 hosts · 331 ms

HostCertsFirst seenLast seenDNS
nicko-cruises.de 4 2026-02-15 2026-09-22 ok
*.nicko-cruises.de 1 2026-02-15 2026-02-15 —
sbc01.nicko-cruises.de 2 2026-03-18 2026-09-01 ok
www.sbc01.nicko-cruises.de 2 2026-03-18 2026-09-01 ok
office.nicko-cruises.de 1 2025-09-24 2025-09-24 ok
www.office.nicko-cruises.de 1 2025-09-24 2025-09-24 ok
serverside.nicko-cruises.de 3 2026-05-16 2026-08-31 ok
karriere.nicko-cruises.de 9 2026-04-22 2026-09-09 ok
vpn-global.nicko-cruises.de 3 2026-06-26 2026-08-25 ok
info.nicko-cruises.de 7 2026-05-08 2026-09-23 ok
sio.nicko-cruises.de 3 2026-04-22 2026-09-23 ok
cdnsio.nicko-cruises.de 3 2026-04-22 2026-09-22 ok
news.nicko-cruises.de 5 2026-04-22 2026-08-20 ok
www.nicko-cruises.de 3 2026-04-22 2026-09-22 ok
survey.nicko-cruises.de 5 2026-04-27 2026-08-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/nicko-cruises.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/nicko-cruises.de.