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 · 311 ms

HostCertsFirst seenLast seenDNS
infakt.pl 5 2025-11-01 2026-10-02 ok
*.infakt.pl 5 2025-11-01 2026-10-02 —
link.rekrutacja.infakt.pl 5 2026-05-29 2026-09-26 ok
jira.infakt.pl 1 2026-01-08 2026-01-08 ok
app.jira.infakt.pl 1 2026-01-08 2026-01-08 ok
irc.chromatic.infakt.pl 5 2026-05-18 2026-09-15 ok
pomoc.infakt.pl 5 2026-05-19 2026-09-16 ok
confluence.infakt.pl 1 2026-01-08 2026-01-08 ok
app.confluence.infakt.pl 1 2026-01-08 2026-01-08 ok
tracking.infakt.pl 9 2026-04-29 2026-08-27 ok
elearning.infakt.pl 2 2026-06-14 2026-06-14 nxdomain
blog.infakt.pl 1 2025-11-09 2025-11-09 ok
service-graph.infakt.pl 8 2026-05-12 2026-09-07 ok
ksiegowi.infakt.pl 8 2026-07-23 2026-09-20 ok
mail.infakt.pl 5 2026-05-05 2026-09-03 ok
remedium.infakt.pl 10 2026-05-14 2026-09-09 ok
mon.infakt.pl 4 2026-06-07 2026-10-04 ok
go.infakt.pl 1 2026-08-31 2026-08-31 ok
sso.infakt.pl 10 2026-04-23 2026-08-20 ok
docs.infakt.pl 4 2026-04-20 2026-08-18 ok
status.infakt.pl 4 2026-04-11 2026-08-09 ok
tableau.v.x.infakt.pl 6 2026-05-17 2026-09-12 ok

Programmatic access, with DNS A records: API GET /v1/hosts/infakt.pl (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/infakt.pl.