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 · 307 ms

HostCertsFirst seenLast seenDNS
swish.nu 5 2026-05-16 2026-09-07 ok
demostore.swish.nu 5 2026-05-02 2026-08-30 ok
api.swish.nu 5 2026-05-26 2026-09-20 ok
atapi.swish.nu 5 2026-04-14 2026-10-06 ok
portal.swish.nu 3 2026-04-27 2026-08-23 ok
atportal.swish.nu 4 2026-05-01 2026-08-29 ok
demo.swish.nu 7 2026-05-19 2026-09-13 ok
app.swish.nu 4 2026-04-25 2026-08-21 ok
fungerar.swish.nu 5 2026-04-25 2026-08-23 ok
developer.swish.nu 4 2026-05-22 2026-09-14 ok
atdeveloper.swish.nu 3 2026-04-18 2026-08-15 ok
status.swish.nu 8 2026-05-06 2026-09-20 ok
www.swish.nu 6 2026-05-24 2026-09-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/swish.nu (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/swish.nu.