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.

16 hosts · 231 ms

HostCertsFirst seenLast seenDNS
afilio.de 23 2026-04-24 2026-08-24 ok
*.afilio.de 27 2026-04-24 2026-09-16 —
amplitude.afilio.de 10 2026-04-28 2026-08-24 ok
*.abruf.afilio.de 8 2026-04-28 2026-08-25 —
vero-api.afilio.de 12 2026-04-23 2026-08-19 ok
click.afilio.de 5 2026-05-14 2026-09-11 ok
peerdom-bot-dev.tunnel.afilio.de 12 2026-05-08 2026-09-03 ok
email.afilio.de 10 2026-04-27 2026-08-23 ok
*.mein.afilio.de 8 2026-04-29 2026-08-26 —
clerk.admin.afilio.de 2 2026-09-26 2026-09-26 ok
accounts.admin.afilio.de 2 2026-09-26 2026-09-26 ok
*.ratgeber.afilio.de 7 2026-07-23 2026-09-20 —
*.admin-pr.afilio.de 10 2026-05-13 2026-09-08 —
*.pr.afilio.de 10 2026-04-28 2026-08-24 —
mta-sts.afilio.de 3 2026-05-18 2026-08-09 ok
janus.afilio.de 4 2026-04-28 2026-04-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/afilio.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/afilio.de.