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) · 419 ms

HostCertsFirst seenLast seenDNS
cpost.cz 19 2025-09-09 2026-10-06 ok
*.cpost.cz 3 2025-08-19 2026-09-11 —
sup100-01.mp120.cpost.cz 1 2026-07-07 2026-07-07 nxdomain
asz1p-as1.mp120.cpost.cz 1 2026-07-07 2026-07-07 nxdomain
sup100-02.mp120.cpost.cz 1 2026-07-07 2026-07-07 nxdomain
asz1p-as2.mp120.cpost.cz 1 2026-07-07 2026-07-07 nxdomain
sup100-03.mp120.cpost.cz 1 2026-07-07 2026-07-07 nxdomain
asz1p-as3.mp120.cpost.cz 1 2026-07-07 2026-07-07 nxdomain
del650-01.cpost.cz 1 2026-05-20 2026-05-20 nxdomain
mal-ise-dsc-01.cpost.cz 1 2026-03-03 2026-03-03 nxdomain
ols-ise-dsc-01.cpost.cz 1 2026-03-03 2026-03-03 nxdomain
mal-ise-mlan-01.cpost.cz 1 2026-05-06 2026-05-06 nxdomain
ols-ise-mlan-01.cpost.cz 1 2026-05-06 2026-05-06 nxdomain
edgemra01.cpost.cz 3 2025-08-27 2026-08-28 ok
edgeb2b01.cpost.cz 2 2025-07-14 2026-07-14 ok
smtp01.cpost.cz 1 2026-02-23 2026-02-23 ok
EX16V-MS1.vad1.cpost.cz 1 2025-12-02 2025-12-02 —
ex16v-ms1.vad1.cpost.cz 1 2025-12-02 2025-12-02 nxdomain
AD6V.vad1.cpost.cz 1 2026-02-09 2026-02-09 —
AD7V.vad1.cpost.cz 1 2026-02-09 2026-02-09 —
s1.cpost.cz 3 2025-08-18 2026-06-29 ok
del340-02.cpost.cz 1 2026-05-20 2026-05-20 nxdomain
edgemra02.cpost.cz 3 2025-08-27 2026-08-28 ok
edgeb2b02.cpost.cz 2 2025-07-14 2026-07-14 ok
smtp02.cpost.cz 1 2026-02-23 2026-02-23 ok
ca2.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
graylog2.cpost.cz 3 2026-03-25 2026-10-06 nxdomain
kaplan2.cpost.cz 1 2025-09-22 2025-09-22 nxdomain
silverfort-fido2.cpost.cz 2 2026-05-18 2026-06-04 nxdomain
silverfortfido2.cpost.cz 1 2026-06-04 2026-06-04 nxdomain
s2.cpost.cz 3 2025-07-07 2026-06-29 ok
smtp03.cpost.cz 1 2026-02-23 2026-02-23 ok
del340-04.cpost.cz 1 2026-05-20 2026-05-20 nxdomain
smtp04.cpost.cz 1 2026-02-23 2026-02-23 ok
conference-2-IMPA.cpost.cz 2 2025-06-10 2025-06-10 —
conference-3-IMPA.cpost.cz 2 2025-06-10 2025-06-10 —
conference-2-IMPB.cpost.cz 2 2025-06-10 2025-06-10 —
conference-3-IMPB.cpost.cz 2 2025-06-10 2025-06-10 —
SCCM1-WA1.AD.cpost.cz 1 2026-08-06 2026-08-06 —
DP1PUB.AD.cpost.cz 1 2026-06-29 2026-06-29 —
DP1PUC.AD.cpost.cz 1 2026-06-19 2026-06-19 —
DP1PUD.AD.cpost.cz 1 2026-06-29 2026-06-29 —
DP1TPUB.TAD.cpost.cz 1 2026-05-21 2026-05-21 —
conference-2-KC-IMP.cpost.cz 2 2025-06-10 2025-06-10 —
conference-3-KC-IMP.cpost.cz 2 2025-06-10 2025-06-10 —
knihaba.cpost.cz 1 2026-03-05 2026-03-05 nxdomain
sap-ariba.cpost.cz 2 2025-07-14 2026-07-14 ok
ca.cpost.cz 2 2026-03-02 2026-03-10 nxdomain
*.ca.cpost.cz 1 2025-10-03 2025-10-03 —
sztsa1.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
sztsa2.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
sztsa3.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
szng.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
rsi.ca.cpost.cz 3 2026-02-24 2026-09-18 nxdomain
szngvyvoj.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
signer.ca.cpost.cz 3 2025-08-06 2026-08-31 nxdomain
sms.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
pkit.ca.cpost.cz 1 2026-09-22 2026-09-22 nxdomain
test.ca.cpost.cz 1 2025-12-02 2025-12-02 nxdomain
szngtest.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
testpcu.ca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
casreplica.cpost.cz 2 2025-09-02 2026-09-25 nxdomain
sztsa1.qca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
sztsa2.qca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
sztsa3.qca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
szng.qca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
szngtest.qca.cpost.cz 1 2026-03-02 2026-03-02 nxdomain
zca.cpost.cz 1 2026-01-02 2026-01-02 nxdomain
kafka.cpost.cz 1 2026-05-26 2026-05-26 nxdomain
edobirka.cpost.cz 1 2025-11-03 2025-11-03 nxdomain
bugzilla.cpost.cz 1 2026-02-10 2026-02-10 nxdomain
cda-brana.cpost.cz 1 2026-05-25 2026-05-25 nxdomain
cda-badatelna.cpost.cz 1 2026-05-25 2026-05-25 nxdomain
ulozna.cpost.cz 1 2025-09-22 2025-09-22 nxdomain
jira.cpost.cz 1 2026-06-29 2026-06-29 nxdomain
edgemra.cpost.cz 3 2025-08-27 2026-08-28 nxdomain
elisa.cpost.cz 1 2026-04-07 2026-04-07 nxdomain
edgeb2b.cpost.cz 2 2025-07-14 2026-07-14 nxdomain
cmdb.cpost.cz 3 2026-01-05 2026-09-21 nxdomain
ucmdb.cpost.cz 1 2026-06-22 2026-06-22 nxdomain
pkb.cpost.cz 2 2025-07-31 2026-08-25 nxdomain
sapshc-db1.dclb.cpost.cz 1 2026-03-05 2026-03-05 nxdomain
ges1-as1.dclb.cpost.cz 1 2025-09-22 2025-09-22 nxdomain
ulo2-as1.dclb.cpost.cz 1 2025-09-22 2025-09-22 nxdomain
kap2-as1.dclb.cpost.cz 1 2025-09-22 2025-09-22 nxdomain
olz2-as1.dclb.cpost.cz 1 2025-09-22 2025-09-22 nxdomain
sapbte-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sapcte-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sappte-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sapmdp-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sappip-as1.dclb.cpost.cz 1 2026-03-05 2026-03-05 nxdomain
sapbjp-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sapmjp-as1.dclb.cpost.cz 1 2026-03-05 2026-03-05 nxdomain
sapsjp-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sapsrp-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sapmsp-as1.dclb.cpost.cz 1 2026-03-05 2026-03-05 nxdomain
sapbpr-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sapcpr-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
sapppr-as1.dclb.cpost.cz 1 2026-03-04 2026-03-04 nxdomain
ges1t-as1.dclb.cpost.cz 1 2025-09-22 2025-09-22 nxdomain

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/cpost.cz.

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/cpost.cz.