DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.2

snt.net.pl · 188.65.40.69:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Certificate verification failed

Subject
CN=*.snt.net.pl
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-01-13T13:19:35+00:00
Expires
2027-01-13T13:19:34+00:00
Days remaining
79
Serial (hex)
621F4F2F7D2D10A9F9FFFE861194F8F6
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

DNS:*.snt.net.pl, DNS:snt.net.pl

SHA-256 fingerprint

46:18:59:68:82:BE:6D:2A:15:A3:CE:97:8E:67:69:C4:E3:63:BD:A9:B7:00:6A:8E:A1:4F:40:75:2A:0D:76:B4
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumdvtlsg2r39ca.crl.certum.pl/certumdvtlsg2r39ca.crl
authorityInfoAccess
OCSP - URI:http://certumdvtlsg2r39ca.ocsp-certum.com CA Issuers - URI:http://certumdvtlsg2r39ca.repository.certum.pl/certumdvtlsg2r39ca.cer
authorityKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.101.1
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.snt.net.pl, DNS:snt.net.pl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Jan 13 13:19:36.450 2026 GMT Extensions: 00:00:05:00:00:0D:40:A8 Signature : ecdsa-with-SHA256 30:44:02:20:29:90:E1:92:57:63:83:CF:46:CC:C3:B0: 44:C3:54:05:C3:57:9C:10:5F:5C:C1:05:33:E5:41:E2: BE:0E:74:31:02:20:4A:D1:EB:B6:64:E6:B1:DA:C3:7F: EC:5B:70:EE:61:77:B8:A2:44:78:FB:1F:33:A7:3E:FC: 70:24:A3:F7:23:AB Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Jan 13 13:19:36.451 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:B5:F8:BA:40:29:10:BB:CE:B5:5F:1A: B5:BE:C7:B7:77:60:75:BA:F5:1F:F8:14:EE:61:77:56: 49:3F:25:3A:53:02:21:00:AE:5B:89:C3:AA:5D:CE:BA: 19:D4:85:4B:09:3B:FF:6B:55:B5:3A:BA:6D:CA:82:F2: AC:C7:B2:7F:87:D2:99:A5 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Jan 13 13:19:36.607 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:AD:3B:4E:F1:96:44:8C:9C:7C:D1:68: 3C:6B:01:60:85:5E:16:45:69:A7:88:B1:D5:EC:79:F8: 0E:10:0F:60:DB:02:20:04:FB:6F:6F:97:2D:40:6C:7B: F5:7B:C8:2C:AF:25:4C:CB:EE:9A:2F:1B:68:53:B9:B5: 31:F4:2E:A2:64:73:AA
-----BEGIN CERTIFICATE-----
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MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
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H4dHNZrJoacuMtLQmDAJqjOg2g/Jzsut78fy
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-25T17:28:34+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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