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.

22 hosts · 362 ms

HostCertsFirst seenLast seenDNS
sparkasse-koelnbonn.de 6 2026-04-01 2026-09-24 ok
psd2-xs2a.sparkasse-koelnbonn.de 1 2026-05-26 2026-05-26 nxdomain
brandhub.sparkasse-koelnbonn.de 2 2026-03-09 2026-08-09 ok
red.sparkasse-koelnbonn.de 12 2026-04-16 2026-08-13 ok
stiftung-jugendhilfe.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
feedback.umfrage.sparkasse-koelnbonn.de 5 2026-06-04 2026-10-02 ok
module.sparkasse-koelnbonn.de 1 2026-04-01 2026-04-01 nxdomain
karriere.sparkasse-koelnbonn.de 4 2026-04-21 2026-08-18 ok
www.karriere.sparkasse-koelnbonn.de 4 2026-04-21 2026-08-18 ok
stiftung-internationale-begegnung.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
datenraum.sparkasse-koelnbonn.de 2 2025-07-16 2026-07-27 ok
stiftungen.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
stiftung-ludwig-van-beethoven.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
info.sparkasse-koelnbonn.de 4 2026-04-20 2026-08-19 ok
newsletter.sparkasse-koelnbonn.de 4 2026-04-16 2026-08-15 ok
services.sparkasse-koelnbonn.de 5 2026-04-13 2026-09-24 ok
events.sparkasse-koelnbonn.de 1 2026-04-30 2026-04-30 ok
stiftung-august-macke-haus.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
stiftungsmanagement.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
stiftung-sport.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
stiftung-kunst.sparkasse-koelnbonn.de 4 2026-04-15 2026-08-13 ok
www.sparkasse-koelnbonn.de 6 2026-04-01 2026-09-24 ok

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