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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

uni-kassel.de · 141.51.95.12:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
C=DE ST=Hessen O=Universitaet Kassel CN=www.uni-kassel.de
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Valid from
2026-09-14T10:32:02+00:00
Expires
2027-04-01T10:32:01+00:00
Days remaining
155
Serial (hex)
1F6BC1C15CA70D3A137E98A28F6A4D08
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:www.uni-kassel.de, DNS:uni-kassel.de, DNS:vm95-11.its.uni-kassel.de, DNS:vm95-13.its.uni-kassel.de, DNS:vm95-10.its.uni-kassel.de, DNS:vm95-12.its.uni-kassel.de

SHA-256 fingerprint

2A:8B:EB:A4:90:0A:1C:F3:DF:17:98:31:31:3B:A0:F8:A4:2C:EF:7C:CD:87:2F:D5:48:BF:47:D4:7B:F1:7A:45
Certificate extensions & PEM
basicConstraints
CA:FALSE
authorityKeyIdentifier
E9:99:06:8D:17:1F:AB:FB:96:1A:5A:C8:5B:5E:5D:5E:EC:DA:9C:8F
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-GEANT-TLS-E1.cer
subjectAltName
DNS:www.uni-kassel.de, DNS:uni-kassel.de, DNS:vm95-11.its.uni-kassel.de, DNS:vm95-13.its.uni-kassel.de, DNS:vm95-10.its.uni-kassel.de, DNS:vm95-12.its.uni-kassel.de
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 0.4.0.2042.1.7 Policy: 1.3.6.1.4.1.26513.1.1.1.2
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-GEANT-TLS-E1.crl
subjectKeyIdentifier
0C:AB:D9:15:90:1A:BA:C8:BF:39:28:F6:33:3F:49:D4:FC:47:43:BE
keyUsage
Digital Signature
ct_precert_scts
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 : Sep 14 10:42:03.970 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:6F:A6:0B:33:D0:F7:5C:87:CB:5E:18:3C: 2E:50:0B:DF:46:B9:58:E6:7C:52:5B:93:4D:85:64:91: 2E:9D:52:67:02:21:00:D9:56:C4:08:3B:49:D9:71:14: AC:2F:AE:69:67:EE:CE:AC:98:8F:03:91:31:43:F8:C7: 23:A6:C7:FB:AE:94:9B Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A2:39:67:C6:0D:B6:46:87:C6:6F:3D:F9:99:94:76: 93:A6:A6:11:20:84:57:D5:55:E7:E3:D0:A1:D9:B6:46 Timestamp : Sep 14 10:42:04.002 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:17:51:65:16:7B:07:29:D6:B6:45:EB:C0: 40:A2:F7:0A:F9:00:BE:73:F4:23:70:54:BA:3D:8A:52: 70:54:BF:FB:02:20:20:94:E3:CA:38:B3:3B:A9:51:58: 44:D0:10:3B:9E:83:E2:9C:D7:B9:B2:B5:F8:1A:FB:53: F8:F6:9B:2F:A1:00 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 : Sep 14 10:42:03.952 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:B3:48:77:65:9E:66:FA:BE:2D:E5:F0: E1:EE:13:9A:CD:05:34:78:0E:07:AC:15:98:30:36:48: 3F:17:88:0E:7F:02:21:00:AC:00:81:A6:24:D8:E1:14: EF:42:80:59:DF:58:C8:60:0A:95:1D:58:15:47:9B:DD: FF:40:9D:ED:42:20:97:D6
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-28T02:00:08+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS ECC Root CA 2021
Valid from
2025-01-03T11:14:21+00:00
Expires
2039-12-31T11:14:20+00:00
Days remaining
4812
Serial (hex)
42FDDCE1261607E1A5E6935A400161DD
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

6C:DF:0B:A1:71:1E:85:6D:22:8B:A0:0C:A0:4C:5C:1C:3D:79:94:4C:03:7B:71:3B:15:5A:4E:E4:B4:7E:C5:3C
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
authorityKeyIdentifier
C9:1B:53:81:12:FE:04:D5:16:D1:AA:BC:9A:6F:B7:A0:95:19:6E:CA
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-TLS-Root-2021-ECC.cer
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-TLS-Root-2021-ECC.crl
subjectKeyIdentifier
E9:99:06:8D:17:1F:AB:FB:96:1A:5A:C8:5B:5E:5D:5E:EC:DA:9C:8F
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS ECC Root CA 2021
Issuer
C=GR L=Athens O=Hellenic Academic and Research Institutions Cert. Authority CN=Hellenic Academic and Research Institutions ECC RootCA 2015
Valid from
2021-09-02T07:44:37+00:00
Expires
2029-08-31T07:44:36+00:00
Days remaining
1038
Serial (hex)
716027C8857A73542DEF516C1C2EEB0F
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

50:E2:7F:90:EB:6A:F4:95:B0:E6:EE:B6:55:CC:89:44:4C:27:D3:C9:5B:68:23:FA:02:AB:DC:95:F1:63:6A:E1
Certificate extensions & PEM
basicConstraints
CA:TRUE
authorityKeyIdentifier
B4:22:0B:82:99:24:01:0E:9C:BB:E4:0E:FD:BF:FB:97:20:93:99:2A
authorityInfoAccess
CA Issuers - URI:http://repo.harica.gr/certs/HaricaECCRootCA2015.crt
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HaricaECCRootCA2015.crl
subjectKeyIdentifier
C9:1B:53:81:12:FE:04:D5:16:D1:AA:BC:9A:6F:B7:A0:95:19:6E:CA
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

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

View certificate JSON

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