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

tu-dresden.de · 141.76.14.10:443

Verified

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

Subject
C=DE ST=Sachsen O=Technische Universitaet Dresden CN=tu-dresden.de
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Valid from
2025-10-28T16:20:14+00:00
Expires
2026-10-28T16:20:14+00:00
Days remaining
36
Serial (hex)
58AFACF8F7FFF7BB874310D318A6F5A5
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:tu-dresden.de, DNS:dresden-uni.eu, DNS:www.tud.de, DNS:weltoffenheit.tu-dresden.de, DNS:www.dresden-uni.eu, DNS:www.dresden-uni.net, DNS:www.tu-dresden.org, DNS:uni-dresden.de, DNS:dresden-uni.info, DNS:www.tu-dresden.de, DNS:www.uni-dresden.de, DNS:webrelaunch.tu-dresden.de, DNS:tu-dresden.org, DNS:www.dresden-uni.info, DNS:tud.de, DNS:dresden-uni.com, DNS:www.dresden-uni.com, DNS:dresden-uni.net

SHA-256 fingerprint

AA:24:D5:B1:12:2E:1D:63:B0:A4:EE:14:53:B3:BB:10:F3:8B:1F:E9:4B:64:A2:55:73:66:72:7A:20:B2:E8:D1
Certificate extensions & PEM
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 OCSP - URI:http://ocsp-tls.harica.gr
subjectAltName
DNS:tu-dresden.de, DNS:dresden-uni.eu, DNS:www.tud.de, DNS:weltoffenheit.tu-dresden.de, DNS:www.dresden-uni.eu, DNS:www.dresden-uni.net, DNS:www.tu-dresden.org, DNS:uni-dresden.de, DNS:dresden-uni.info, DNS:www.tu-dresden.de, DNS:www.uni-dresden.de, DNS:webrelaunch.tu-dresden.de, DNS:tu-dresden.org, DNS:www.dresden-uni.info, DNS:tud.de, DNS:dresden-uni.com, DNS:www.dresden-uni.com, DNS:dresden-uni.net
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
4B:F7:05:E1:AF:D0:A0:46:67:34:70:88:57:17:C5:6C:42:D8:CF:9A
keyUsage
Digital Signature
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Oct 28 16:30:16.027 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:8B:41:BF:07:0B:3A:F5:8F:90:5F:44: 6F:B3:5D:D6:CC:CD:A1:FD:2D:41:C7:86:B6:D0:E8:14: 3D:A5:B7:55:CC:02:21:00:BD:F3:63:0D:58:7A:0E:DF: E3:16:2F:99:1A:38:3D:56:36:A6:3C:FA:14:E9:7D:49: 16:6B:DF:E6:43:42:78:D1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Oct 28 16:30:15.977 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:93:B3:AB:77:C7:A8:B2:62:F3:A1:B6: BE:FA:61:8C:A3:E3:64:A3:04:4E:5A:8A:B5:F1:1E:0B: 21:F4:39:CB:A1:02:20:50:8C:13:15:E6:3D:91:FA:25: 61:F0:28:97:2E:9D:91:8A:91:49:DE:72:B2:44:8E:DC: FD:26:FF:4D:AA:77:33 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Oct 28 16:30:16.026 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:CC:CB:E3:D4:88:EB:97:EC:05:06:2D: 0C:F3:94:EC:4F:97:96:E2:FD:A2:9E:B1:97:2C:D7:D8: BF:59:DE:0D:CA:02:20:57:0C:F9:3C:9D:B3:F9:3D:BC: B3:57:CB:DC:25:97:CB:1D:84:D1:40:A8:49:02:34:77: FD:AB:50:05:E0:73:6F
-----BEGIN CERTIFICATE-----
MIIGFTCCBZugAwIBAgIQWK+s+Pf/97uHQxDTGKb1pTAKBggqhkjOPQQDAzBgMQsw
CQYDVQQGEwJHUjE3MDUGA1UECgwuSGVsbGVuaWMgQWNhZGVtaWMgYW5kIFJlc2Vh
cmNoIEluc3RpdHV0aW9ucyBDQTEYMBYGA1UEAwwPR0VBTlQgVExTIEVDQyAxMB4X
DTI1MTAyODE2MjAxNFoXDTI2MTAyODE2MjAxNFowYTELMAkGA1UEBhMCREUxEDAO
BgNVBAgMB1NhY2hzZW4xKDAmBgNVBAoMH1RlY2huaXNjaGUgVW5pdmVyc2l0YWV0
IERyZXNkZW4xFjAUBgNVBAMMDXR1LWRyZXNkZW4uZGUwWTATBgcqhkjOPQIBBggq
hkjOPQMBBwNCAAS2+tMCN2J7jVJEHlfvelhGwH9JN1FESJ1cG1GQ7N/tkJPJTg/V
58y0PMloMIcMs6ASsGUEZlc0hrNz1o7iu7yho4IENDCCBDAwHwYDVR0jBBgwFoAU
6ZkGjRcfq/uWGlrIW15dXuzanI8wbwYIKwYBBQUHAQEEYzBhMDgGCCsGAQUFBzAC
hixodHRwOi8vY3J0LmhhcmljYS5nci9IQVJJQ0EtR0VBTlQtVExTLUUxLmNlcjAl
BggrBgEFBQcwAYYZaHR0cDovL29jc3AtdGxzLmhhcmljYS5ncjCCAVsGA1UdEQSC
AVIwggFOgg10dS1kcmVzZGVuLmRlgg5kcmVzZGVuLXVuaS5ldYIKd3d3LnR1ZC5k
ZYIbd2VsdG9mZmVuaGVpdC50dS1kcmVzZGVuLmRlghJ3d3cuZHJlc2Rlbi11bmku
ZXWCE3d3dy5kcmVzZGVuLXVuaS5uZXSCEnd3dy50dS1kcmVzZGVuLm9yZ4IOdW5p
LWRyZXNkZW4uZGWCEGRyZXNkZW4tdW5pLmluZm+CEXd3dy50dS1kcmVzZGVuLmRl
ghJ3d3cudW5pLWRyZXNkZW4uZGWCGXdlYnJlbGF1bmNoLnR1LWRyZXNkZW4uZGWC
DnR1LWRyZXNkZW4ub3JnghR3d3cuZHJlc2Rlbi11bmkuaW5mb4IGdHVkLmRlgg9k
cmVzZGVuLXVuaS5jb22CE3d3dy5kcmVzZGVuLXVuaS5jb22CD2RyZXNkZW4tdW5p
Lm5ldDAtBgNVHSAEJjAkMAgGBmeBDAECAjAIBgYEAI96AQcwDgYMKwYBBAGBzxEB
AQECMB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcDATA9BgNVHR8ENjA0MDKg
MKAuhixodHRwOi8vY3JsLmhhcmljYS5nci9IQVJJQ0EtR0VBTlQtVExTLUUxLmNy
bDAdBgNVHQ4EFgQUS/cF4a/QoEZnNHCIVxfFbELYz5owDgYDVR0PAQH/BAQDAgeA
MIIBfwYKKwYBBAHWeQIEAgSCAW8EggFrAWkAdwCUTkOH+uzB74HzGSQmqBhlAcfT
XzgCAT9yZ31VNy4Z2AAAAZorp+nbAAAEAwBIMEYCIQCLQb8HCzr1j5BfRG+zXdbM
zaH9LUHHhrbQ6BQ9pbdVzAIhAL3zYw1Yeg7f4xYvmRo4PVY2pjz6FOl9SRZr3+ZD
QnjRAHYA2AlVO5RPev/IFhlvlE+Fq7D4/F6HVSYPFdEucrtFSxQAAAGaK6fpqQAA
BAMARzBFAiEAk7Ord8eosmLzoba++mGMo+NkowROWoq18R4LIfQ5y6ECIFCMExXm
PZH6JWHwKJcunZGKkUnecrJEjtz9Jv9NqnczAHYArKswcGzr7IQx9BPS9JFfER5C
JEOx8qaMTzwrO6ceAsMAAAGaK6fp2gAABAMARzBFAiEAzMvj1Ijrl+wFBi0M85Ts
T5eW4v2inrGXLNfYv1neDcoCIFcM+Tyds/k9vLNXy9wll8sdhNFAqEkCNHf9q1AF
4HNvMAoGCCqGSM49BAMDA2gAMGUCMDV/Pb01A01zHbGbAg9n28e/d203SV6VWumX
gmi1kdOkOQIDqDZT5kLsonk5i5B7bgIxAIax3iIOrKf812DMAh5YKPdkLSHh8S/I
dw6KSW7x4eRbnxSHGG84JnajjdH2Xa2Dng==
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-22T07:59:36+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
4848
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
1073
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-----
MIIDezCCAwGgAwIBAgIQcWAnyIV6c1Qt71FsHC7rDzAKBggqhkjOPQQDAzCBqjEL
MAkGA1UEBhMCR1IxDzANBgNVBAcTBkF0aGVuczFEMEIGA1UEChM7SGVsbGVuaWMg
QWNhZGVtaWMgYW5kIFJlc2VhcmNoIEluc3RpdHV0aW9ucyBDZXJ0LiBBdXRob3Jp
dHkxRDBCBgNVBAMTO0hlbGxlbmljIEFjYWRlbWljIGFuZCBSZXNlYXJjaCBJbnN0
aXR1dGlvbnMgRUNDIFJvb3RDQSAyMDE1MB4XDTIxMDkwMjA3NDQzN1oXDTI5MDgz
MTA3NDQzNlowbDELMAkGA1UEBhMCR1IxNzA1BgNVBAoMLkhlbGxlbmljIEFjYWRl
bWljIGFuZCBSZXNlYXJjaCBJbnN0aXR1dGlvbnMgQ0ExJDAiBgNVBAMMG0hBUklD
QSBUTFMgRUNDIFJvb3QgQ0EgMjAyMTB2MBAGByqGSM49AgEGBSuBBAAiA2IABDgI
/rGgltJ6rK9JOtDA4MM7KKrxcm1lAEeIhPyaJmuqS7psBAqIXhfyVYf8MLA04jRY
VxqEU+kw2anylnTDUR9YSTHMmE5gEYd103KUkE+bECUqqHgtvpBBWJAVcqeht6OC
AScwggEjMA8GA1UdEwEB/wQFMAMBAf8wHwYDVR0jBBgwFoAUtCILgpkkAQ6cu+QO
/b/7lyCTmSowTwYIKwYBBQUHAQEEQzBBMD8GCCsGAQUFBzAChjNodHRwOi8vcmVw
by5oYXJpY2EuZ3IvY2VydHMvSGFyaWNhRUNDUm9vdENBMjAxNS5jcnQwEQYDVR0g
BAowCDAGBgRVHSAAMB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcDATA9BgNV
HR8ENjA0MDKgMKAuhixodHRwOi8vY3JsLmhhcmljYS5nci9IYXJpY2FFQ0NSb290
Q0EyMDE1LmNybDAdBgNVHQ4EFgQUyRtTgRL+BNUW0aq8mm+3oJUZbsowDgYDVR0P
AQH/BAQDAgGGMAoGCCqGSM49BAMDA2gAMGUCMQCPc45gQV6pCkMR4px3k+YnF0Mo
DpXQ0+0lWz7fnplqgHn+qHmoKrE5Y/bcWucG6QQCMB/DIYjUTGAl5j07G7ZIuK3Q
ehx68VPXTwvJ9tLbh9A9SkiBmJGpiHL7Rzfxa5CptQ==
-----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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