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

TLSv1.3

cesca.es · 84.88.27.7:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`csuc.cat' did not match expected CN=`cesca.es'

Certificate verification failed

Subject
C=ES L=Barcelona O=Consorci de Serveis Universitaris de Catalunya CN=csuc.cat
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Valid from
2026-07-22T06:02:28+00:00
Expires
2027-02-06T06:02:27+00:00
Days remaining
133
Serial (hex)
0169A48D78D5F3899C26BB9F35BCD186
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:csuc.cat, DNS:www.csuc.cat

SHA-256 fingerprint

D6:2C:7E:60:73:AB:15:B9:B2:CF:8A:25:E5:6C:52:52:12:0A:8F:25:EF:3E:CF:D0:5F:0D:9F:FB:F5:0C:03:95
Certificate extensions & PEM
basicConstraints
CA:FALSE
authorityKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-GEANT-TLS-R1.cer
subjectAltName
DNS:csuc.cat, DNS:www.csuc.cat
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-R1.crl
subjectKeyIdentifier
ED:B5:AA:92:21:EB:29:BE:36:AB:1A:E0:4B:4B:1E:8E:A8:4C:12:6B
keyUsage
Digital Signature, Key Encipherment
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 : Jul 22 06:12:29.826 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:87:F3:22:34:13:AD:47:3D:90:1A:EC: C5:E3:23:47:FC:40:EB:87:A3:F3:17:85:A5:B2:A8:72: DA:29:FB:D5:8C:02:21:00:C2:D1:9D:27:B2:0B:C4:3D: F9:C6:F9:4B:6A:24:01:92:78:4F:B9:3D:CE:B9:19:C1: 73:51:DB:19:FF:6F:7A:6F 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 : Jul 22 06:12:29.856 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:AF:74:92:2A:A4:9B:B7:30:BD:72:8A: B2:7E:B7:D3:B9:EA:3D:87:B4:71:B3:44:E9:14:96:93: 08:D1:80:26:B2:02:20:16:F9:AA:C8:41:E7:04:A9:F9: 95:A0:C8:5D:19:76:B9:26:D8:70:4F:82:D8:6E:DC:99: AF:DA:98:B8:C0:56:0B 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 : Jul 22 06:12:29.802 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:97:B9:1E:E3:11:45:4F:C9:46:74:DC: 49:B9:62:C5:02:02:91:96:C2:07:87:81:4C:B7:20:7E: 11:6C:4E:5B:3E:02:20:6C:DE:C4:55:49:89:74:C2:F6: A0:2F:98:DE:DA:35:98:BA:E5:D9:D3:44:91:B7:0D:FC: 8C:E9:24:80:80:B4:E2
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-25T21:37:33+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS RSA Root CA 2021
Valid from
2025-01-03T11:15:00+00:00
Expires
2039-12-31T11:14:59+00:00
Days remaining
4844
Serial (hex)
14D57BF3692228219A5567FA91651B22
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

5B:67:8D:C4:40:95:A5:28:95:B6:3B:31:F2:72:27:F4:B3:6C:3E:34:74:91:BF:2B:FA:69:18:37:A5:FB:8C:79
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
authorityKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-TLS-Root-2021-RSA.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-RSA.crl
subjectKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----
MIIGBTCCA+2gAwIBAgIQFNV782kiKCGaVWf6kWUbIjANBgkqhkiG9w0BAQsFADBs
MQswCQYDVQQGEwJHUjE3MDUGA1UECgwuSGVsbGVuaWMgQWNhZGVtaWMgYW5kIFJl
c2VhcmNoIEluc3RpdHV0aW9ucyBDQTEkMCIGA1UEAwwbSEFSSUNBIFRMUyBSU0Eg
Um9vdCBDQSAyMDIxMB4XDTI1MDEwMzExMTUwMFoXDTM5MTIzMTExMTQ1OVowYDEL
MAkGA1UEBhMCR1IxNzA1BgNVBAoMLkhlbGxlbmljIEFjYWRlbWljIGFuZCBSZXNl
YXJjaCBJbnN0aXR1dGlvbnMgQ0ExGDAWBgNVBAMMD0dFQU5UIFRMUyBSU0EgMTCC
AaIwDQYJKoZIhvcNAQEBBQADggGPADCCAYoCggGBAKEEaZSzEzznAPk8IEa17GSG
yJzPTj4cwRY7/vcq2BPT5+IRGxQtaCdgLXIEl2cdPdIkj2eyakFmgMjAtyeju8V8
dRayQCD/bWjJ7thDlowgLljQaXirxnYbT8bzRHAhCZqBakYgi5KWw9dANLyDHGpX
UdY259ab0lWEaFE5Uu6IzQSMJOAy4l/Twym8GUiy0qMDEBFSlm31C9BXpdHKKAlh
vIjMiKoDeTWl5vZaLB2MMRGY1yW2ftPgIP0/MkX1uFITlvHmmMTngxplH1nybEIJ
FiwHg1KiLk1TprcZgeO2gxE5Lz3wTFWrsUlAzrh5xWmscWkjNi/4BpeuiT5+NExF
czboLnXOfjuci/7bsnPi1/aZN/iKNbJRnngFoLaKVMmqCS7Xo34f+BITatryQZFE
u2oDKExQGlxDBCfYMLgLucX/onpLzUSgeQITNLx6i5tGGbUYH+9Dy3GI66L/5tPj
qzlOsydki8ZYGE5SBJeWCZ2IrhUe0WzZ2b6Zhk6JAQIDAQABo4IBLTCCASkwEgYD
VR0TAQH/BAgwBgEB/wIBADAfBgNVHSMEGDAWgBQKSCOmYKSSCjPqk1vFV+olTb0S
7jBNBggrBgEFBQcBAQRBMD8wPQYIKwYBBQUHMAKGMWh0dHA6Ly9jcnQuaGFyaWNh
LmdyL0hBUklDQS1UTFMtUm9vdC0yMDIxLVJTQS5jZXIwEQYDVR0gBAowCDAGBgRV
HSAAMB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcDATBCBgNVHR8EOzA5MDeg
NaAzhjFodHRwOi8vY3JsLmhhcmljYS5nci9IQVJJQ0EtVExTLVJvb3QtMjAyMS1S
U0EuY3JsMB0GA1UdDgQWBBSGAXI/jKlw4jEGUxbOAV9becg8OzAOBgNVHQ8BAf8E
BAMCAYYwDQYJKoZIhvcNAQELBQADggIBABkssjQzYrOo4GMsKegaChP16yNe6Sck
cWBymM455R2rMeuQ3zlxUNOEt+KUfgueOA2urp4j6TlPbs/XxpwuN3I1f09Luk5b
+ZgRXM7obE6ZLTerVQWKoTShyl34R2XlK8pEy7+67Ht4lcJzt+K6K5gEuoPSGQDP
ef+fUfmXrFcgBMcMbtfDb9dubFKNZZxo5nAXiqhFMOIyByag3H+tOTuH8zuId9pH
RDsUpAIHJ9/W2WBfLcKav7IKRlNBRD/sPBy903J9WHPKwl8kQSDA+aa7XCYk7bJt
Eyf+7GM9F5cZ7+YyknXqnv/rtQEkTKZdQo5Us18VFe9qqj94tXbLdk7PejJYNB4O
Zlli44Ld7rtqfFlUych7gIxFOmiyxMQQYrYmUi+74lEZvfoNhuref0CupuKpz6O3
dLv6kO9T10uNdDBoBQTkge3UzHafTIe3R2o3ujXKUGPwyc9m7/FETyKLUCwSU/5O
AVOeBCU8QtkKKjM8AmbpKpe3pHWcyq3R7B3LmIALkMPTydyDfxen65IDqREbVq8N
xjhkJThUz40JqOlN6uqKqeDISj/IoucYwsqW24AlO7ZzNmohQmMi8ep23H4hBSh0
GBTe2XvkuzaNf92syK8l2HzO+13GLCjzYLTPvXTO9UpK8DGyfGZOuamuwbAnbNpE
3RfjV9IaUQGJ
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS RSA Root CA 2021
Issuer
C=GR L=Athens O=Hellenic Academic and Research Institutions Cert. Authority CN=Hellenic Academic and Research Institutions RootCA 2015
Valid from
2021-09-02T07:41:55+00:00
Expires
2029-08-31T07:41:54+00:00
Days remaining
1070
Serial (hex)
2A6086D4D4DE45C95E4B98FBBF2FBF26
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4A:CD:8D:C6:02:0A:54:5A:85:89:43:A5:53:B5:E0:F3:FC:5B:85:9A:EA:17:46:65:0D:69:CF:12:10:F9:56:D8
Certificate extensions & PEM
basicConstraints
CA:TRUE
authorityKeyIdentifier
71:15:67:C8:C8:C9:BD:75:5D:72:D0:38:18:6A:9D:F3:71:24:54:0B
authorityInfoAccess
CA Issuers - URI:http://repo.harica.gr/certs/HaricaRootCA2015.crt
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HaricaRootCA2015.crl
subjectKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
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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