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.

100 hosts (first page) · 463 ms

HostCertsFirst seenLast seenDNS
fillup.pl 19 2026-01-14 2026-09-13 ok
*.fillup.pl 16 2026-06-22 2026-08-22 —
dev1.fillup.pl 7 2026-04-29 2026-09-05 ok
upl-1.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
nip-2.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
pcc-3.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
zap-3.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
api.k24.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
vat-7.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
cit-8.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
dokumentacja.dev1.fillup.pl 3 2026-07-15 2026-09-14 ok
public.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
download.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
e-deklaracje.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
secure.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
api.secure.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
api.getresponse.dev1.fillup.pl 7 2026-04-29 2026-09-05 ok
df.dev1.fillup.pl 5 2026-06-05 2026-09-05 ok
graylogai.dev1.fillup.pl 7 2026-05-03 2026-09-05 ok
api.graylogai.dev1.fillup.pl 7 2026-05-03 2026-09-07 ok
api.dev1.fillup.pl 7 2026-05-01 2026-09-05 ok
mikrorachunek.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
jpk.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
dysk.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
mssql.dev1.fillup.pl 7 2026-05-01 2026-09-05 ok
premiumdb.premium.dev1.fillup.pl 5 2026-05-19 2026-09-05 ok
faktury.premium.dev1.fillup.pl 2 2026-05-19 2026-05-19 ok
upo.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
konto.dev1.fillup.pl 9 2026-04-26 2026-09-05 ok
sklep.dev1.fillup.pl 7 2026-04-29 2026-09-05 ok
bmedia.sklep.dev1.fillup.pl 7 2026-04-29 2026-09-05 ok
pit-op.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
api.ocr.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
logger.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
reseller.dev1.fillup.pl 7 2026-05-01 2026-09-05 ok
api.notifications.dev1.fillup.pl 6 2026-04-10 2026-09-05 ok
e-zus.dev1.fillup.pl 7 2026-05-05 2026-09-05 ok
api.blackbox.dev1.fillup.pl 5 2026-05-08 2026-09-05 ok
firmly.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
api.faktury.dev1.fillup.pl 9 2026-04-26 2026-09-05 ok
demo.api.faktury.dev1.fillup.pl 2 2026-06-05 2026-06-05 ok
azure-proxy.dev1.fillup.pl 7 2026-04-26 2026-09-05 ok
test2.fillup.pl 2 2026-06-06 2026-06-06 ok
dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
upl-1.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
nip-2.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
pcc-3.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
zap-3.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
api.k24.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
vat-7.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
cit-8.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
public.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
download.dev2.fillup.pl 5 2026-05-15 2026-09-04 ok
e-deklaracje.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
secure.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
api.secure.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
df.dev2.fillup.pl 5 2026-06-04 2026-09-04 ok
api.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
mikrorachunek.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
jpk.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
dysk.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
upo.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
konto.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
sklep.dev2.fillup.pl 7 2026-04-25 2026-09-04 ok
bmedia.sklep.dev2.fillup.pl 7 2026-04-25 2026-09-04 ok
pit-op.dev2.fillup.pl 9 2026-04-26 2026-09-04 ok
api.ocr.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
logger.dev2.fillup.pl 5 2026-05-29 2026-09-04 ok
reseller.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
api.notifications.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
e-zus.dev2.fillup.pl 7 2026-04-26 2026-09-04 ok
api.blackbox.dev2.fillup.pl 6 2026-04-20 2026-09-04 ok
firmly.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
api.faktury.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
bmedia.api.faktury.dev2.fillup.pl 2 2026-05-08 2026-05-08 ok
demo.api.faktury.dev2.fillup.pl 2 2026-05-18 2026-05-18 ok
azure-proxy.dev2.fillup.pl 5 2026-05-08 2026-09-04 ok
dev3.fillup.pl 5 2026-05-08 2026-08-24 ok
upl-1.dev3.fillup.pl 5 2026-04-26 2026-08-24 ok
nip-2.dev3.fillup.pl 5 2026-04-26 2026-08-24 ok
pcc-3.dev3.fillup.pl 5 2026-04-26 2026-08-24 ok
zap-3.dev3.fillup.pl 5 2026-04-26 2026-08-24 ok
api.k24.dev3.fillup.pl 5 2026-05-09 2026-08-24 ok
vat-7.dev3.fillup.pl 5 2026-04-26 2026-09-05 ok
cit-8.dev3.fillup.pl 5 2026-04-26 2026-08-24 ok
public.dev3.fillup.pl 5 2026-05-08 2026-08-24 ok
download.dev3.fillup.pl 5 2026-05-17 2026-08-24 ok
e-deklaracje.dev3.fillup.pl 5 2026-04-26 2026-08-24 ok
secure.dev3.fillup.pl 5 2026-05-08 2026-08-24 ok
api.secure.dev3.fillup.pl 5 2026-05-08 2026-08-24 ok
api.getresponse.dev3.fillup.pl 3 2026-06-24 2026-08-24 ok
df.dev3.fillup.pl 5 2026-06-04 2026-08-24 ok
api.dev3.fillup.pl 5 2026-04-26 2026-09-05 ok
mikrorachunek.dev3.fillup.pl 5 2026-04-26 2026-09-05 ok
jpk.dev3.fillup.pl 5 2026-04-26 2026-09-05 ok
dysk.dev3.fillup.pl 5 2026-05-08 2026-08-24 ok
mssql.dev3.fillup.pl 3 2026-06-24 2026-08-24 ok
upo.dev3.fillup.pl 5 2026-04-26 2026-09-05 ok
konto.dev3.fillup.pl 5 2026-05-08 2026-08-24 ok
sklep.dev3.fillup.pl 5 2026-05-04 2026-08-24 ok

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/fillup.pl.

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/fillup.pl.