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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

TLSv1.3

sepanta.net · 85.133.129.2:443

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=*.sepanta.com
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-06-27T08:29:26+00:00
Expires
2027-01-12T08:29:25+00:00
Days remaining
98
Serial (hex)
27E6D931B9E85E26F3C93B599D6CBA1B
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.sepanta.com, DNS:sepanta.com

SHA-256 fingerprint

8C:44:78:8E:DB:DE:5B:A0:71:CE:4F:75:5F:44:E1:91:FB:02:2E:AD:20:93:83:0C:99:39:C2:9E:8A:22:66:7B
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:*.sepanta.com, DNS:sepanta.com
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Jun 27 08:29:27.459 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4F:DC:2B:9D:74:55:14:44:1A:51:7C:FC: C6:8C:96:E9:35:8A:59:A3:79:A3:BB:6D:98:C6:07:1B: E3:30:D7:D4:02:20:10:E1:FD:3E:39:A0:20:F5:6C:0A: 13:84:03:EF:FC:4F:DA:CE:BE:33:25:83:21:51:0E:90: 50:BD:0F:11:E9:77 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 : Jun 27 08:29:27.656 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:EB:81:A3:42:70:1A:89:24:AD:AB:59: 21:C8:29:1C:03:41:02:5E:50:30:F0:B3:4E:5D:C4:40: F8:AA:A6:39:45:02:21:00:C3:01:7E:B6:25:9B:D5:39: 84:AD:88:C9:16:01:A9:E8:1A:53:35:48:35:80:9A:57: 12:6C:1C:B0:B7:52:EC:9F Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Jun 27 08:29:27.410 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:D9:38:D2:69:01:77:04:4F:70:E4:88: 59:C4:86:60:86:B0:E8:87:0C:E2:F2:7C:5C:90:8A:77: 8A:3D:DF:7D:9C:02:21:00:E5:86:90:87:14:B5:E3:9C: 1E:29:38:60:FB:BF:CE:D1:E4:60:93:D1:9A:F3:EB:AA: 73:2B:D5:F8:97:9C:9B:AB
-----BEGIN CERTIFICATE-----
MIIIEzCCBfugAwIBAgIQJ+bZMbnoXibzyTtZnWy6GzANBgkqhkiG9w0BAQsFADBS
MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
MSAwHgYDVQQDDBdDZXJ0dW0gRFYgVExTIEcyIFIzOSBDQTAeFw0yNjA2MjcwODI5
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MA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQDHux5sAegygqVR5sV+7t9zt8Un
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d17sMRJf8Ud0EkL1p7yrToUfXiwpq3X6xhPdL7sxL53kfa76B8gSaNY+aVOdxEQH
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OhHzynqONGDLeBndlYGk1ey0RepZNXMhRTz9ZvytJ0sCEKsgrMwdQ7OrrH2cC1CT
ngQNvGsrFdNkdcLivV0uHsF+LxNLlTYmT/NAa3p6xH1SC37KbAcgpt2eDmxu/Lt9
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GxLwJXCKQri2XgrLKILxwlKCSOR+L7s8APIPdu4iOT7Kv/aAv2plGI1RXtNwkRuh
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MIIBfwYKKwYBBAHWeQIEAgSCAW8EggFrAWkAdQBEwr0M6RQOZKXJSgGTClqhuzWX
DgDuERaJaCocRNe1ZgAAAZ8IMrAjAAAEAwBGMEQCIE/cK510VRREGlF8/MaMluk1
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LNOM2fdkyAyJGR6fAgAAAZ8IMq/yAAAEAwBIMEYCIQDZONJpAXcET3DkiFnEhmCG
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nJurMA0GCSqGSIb3DQEBCwUAA4ICAQAGajH9utgJtshi32cIChXW+TARpWQy6J9r
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CPtv/D7dVwpjrOAlRCLdh2Ccfwo1XD5leEipNM+kbx1JAaEGBSjNG01gu91lulmr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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-05T21:22:21+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Domain Validation CA SHA2
Issuer
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Trusted Network CA
Valid from
2014-09-11T12:00:00+00:00
Expires
2027-06-09T10:46:39+00:00
Days remaining
246
Serial (hex)
26DDD22B46C9C44D5A694D39807E72AD
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

12:9F:B5:DE:50:1E:24:04:1C:D1:4A:81:07:5F:D1:CD:E2:57:40:8D:4A:35:3E:63:69:12:E3:8B:DD:A2:D3:FB
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
E5:31:AD:BF:3A:11:96:F4:83:BC:50:3C:D4:B7:90:9B:90:EE:DE:25
authorityKeyIdentifier
08:76:CD:CB:07:FF:24:F6:C5:CD:ED:BB:90:BC:E2:84:37:46:75:F7
keyUsage
Certificate Sign, CRL Sign
crlDistributionPoints
Full Name: URI:http://crl.certum.pl/ctnca.crl
authorityInfoAccess
OCSP - URI:http://subca.ocsp-certum.com CA Issuers - URI:http://repository.certum.pl/ctnca.cer
certificatePolicies
Policy: X509v3 Any Policy CPS: http://www.certum.pl/CPS
-----BEGIN CERTIFICATE-----
MIIEzjCCA7agAwIBAgIQJt3SK0bJxE1aaU05gH5yrTANBgkqhkiG9w0BAQsFADB+
MQswCQYDVQQGEwJQTDEiMCAGA1UEChMZVW5pemV0byBUZWNobm9sb2dpZXMgUy5B
LjEnMCUGA1UECxMeQ2VydHVtIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MSIwIAYD
VQQDExlDZXJ0dW0gVHJ1c3RlZCBOZXR3b3JrIENBMB4XDTE0MDkxMTEyMDAwMFoX
DTI3MDYwOTEwNDYzOVowgYUxCzAJBgNVBAYTAlBMMSIwIAYDVQQKExlVbml6ZXRv
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biBBdXRob3JpdHkxKTAnBgNVBAMTIENlcnR1bSBEb21haW4gVmFsaWRhdGlvbiBD
QSBTSEEyMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoSVj343kIAfZ
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5TGtvzoRlvSDvFA81LeQm5Du3iUwHwYDVR0jBBgwFoAUCHbNywf/JPbFze27kLzi
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dHA6Ly9yZXBvc2l0b3J5LmNlcnR1bS5wbC9jdG5jYS5jZXIwOQYDVR0gBDIwMDAu
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Z8duBwONDpbLCgPMPviHPDUwzRiM1XHdzd1hsBOjZEZO/nFOa2XpFATyP6i9DDY9
Kl2eB/LCT5DFXk0YN9EnKICkNuXKk2plDviTua9SWEt6cdi68+/S8/ail+RdFAKa
y+WutpPhI5+bP0b37o6hAFtmwx5oI4YPXXe6U635UvtwFcV16895rUl88nZirkQv
xV9RNCVBahIKX46uEMRDiTX97P8x5uweh+k6fClQRUGjFA==
-----END CERTIFICATE-----

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

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