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.

35 hosts · 391 ms

HostCertsFirst seenLast seenDNS
siepomaga.pl 137 2026-04-11 2026-10-04 ok
*.siepomaga.pl 23 2026-04-17 2026-10-04 —
pomoc.siepomaga.pl 5 2026-05-16 2026-09-13 ok
moje.siepomaga.pl 8 2026-05-13 2026-09-08 ok
app-moje.siepomaga.pl 6 2026-05-02 2026-08-28 ok
www.moje.siepomaga.pl 10 2026-05-13 2026-09-09 ok
moje-staging.siepomaga.pl 10 2026-05-01 2026-08-27 ok
www.moje-staging.siepomaga.pl 8 2026-05-01 2026-08-27 ok
etracking.siepomaga.pl 11 2026-04-25 2026-08-24 ok
og-testing.siepomaga.pl 10 2026-04-18 2026-08-14 nxdomain
staging-og-testing.siepomaga.pl 12 2026-04-24 2026-08-20 nxdomain
og.siepomaga.pl 12 2026-05-20 2026-09-15 ok
staging-og.siepomaga.pl 11 2026-05-20 2026-09-15 ok
master-og.siepomaga.pl 10 2026-04-11 2026-08-07 ok
pliki.siepomaga.pl 9 2026-05-30 2026-09-25 ok
prerender.siepomaga.pl 8 2026-05-07 2026-09-02 ok
moje-master.siepomaga.pl 6 2026-05-13 2026-09-08 ok
www.moje-master.siepomaga.pl 10 2026-05-13 2026-09-08 ok
pages.siepomaga.pl 5 2026-04-29 2026-08-27 ok
mta-sts.siepomaga.pl 4 2026-04-16 2026-08-14 ok
chat.siepomaga.pl 10 2026-05-01 2026-08-27 ok
staging.chat.siepomaga.pl 12 2026-05-01 2026-08-27 ok
master.chat.siepomaga.pl 8 2026-04-16 2026-08-12 ok
datkomat.siepomaga.pl 8 2026-05-28 2026-09-23 ok
www.datkomat.siepomaga.pl 7 2026-05-28 2026-09-23 ok
moje-development.siepomaga.pl 5 2026-05-06 2026-08-31 ok
ilert.siepomaga.pl 2 2026-08-10 2026-08-10 ok
*.ilert.siepomaga.pl 2 2026-08-10 2026-08-10 —
og-test.siepomaga.pl 6 2026-06-02 2026-09-28 nxdomain
staging-og-test.siepomaga.pl 6 2026-06-02 2026-09-28 nxdomain
master-og-test.siepomaga.pl 7 2026-06-02 2026-09-28 nxdomain
pabgey.siepomaga.pl 3 2026-05-27 2026-10-06 ok
firmy.siepomaga.pl 10 2026-04-17 2026-08-14 ok
www.firmy.siepomaga.pl 8 2026-04-17 2026-08-13 ok
widgety.siepomaga.pl 11 2026-06-01 2026-09-28 ok

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