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

uni-bonn.de · 131.220.250.29:443

Verified

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

Subject
C=DE ST=Nordrhein-Westfalen O=Rheinische Friedrich-Wilhelms-Universitaet Bonn CN=uni-bonn.de
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Valid from
2026-10-30T20:16:37+00:00
Expires
2027-05-17T20:16:36+00:00
Days remaining
198
Serial (hex)
07A4B9E8928C5FF67863EEA51BC6A29E
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

DNS:uni-bonn.de

SHA-256 fingerprint

0D:2A:9F:A9:C1:CC:E1:19:60:E0:F9:8D:11:0C:69:F2:E1:FA:54:C6:1F:4F:CD:41:74:FD:40:EE:AF:EE:2E:87
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:uni-bonn.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
0E:E8:AE:DB:3F:C0:D6:84:24:1C:31:10:40:B9:7A:13:5D:E3:34:B9
keyUsage
Digital Signature
ct_precert_scts
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 : Oct 30 20:26:38.627 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:BC:22:90:B9:8F:A1:1F:CE:49:77:F6: 9D:E4:4C:D6:8D:7B:1A:EC:16:4F:0C:51:92:E7:64:65: 26:E7:8F:ED:2F:02:20:61:6A:3D:6D:12:E1:F9:70:85: 96:C4:6D:49:AC:07:D9:1D:EE:90:0A:49:E2:C5:73:FD: 5F:C9:94:48:A9:47:0E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Oct 30 20:26:38.737 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:0A:42:A6:E6:15:70:29:95:5C:7A:44:C0: 7F:5A:C5:FD:54:87:4F:19:FD:65:18:DB:10:91:AF:81: 9C:D0:EB:6C:02:21:00:BD:D1:D2:75:B6:E7:5E:AE:E4: 2C:A3:F4:CC:61:16:02:ED:5B:7C:99:12:CB:D3:0A:EF: F6:A7:28:0A:BD:3C:5D Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 00:1A:5D:1A:1C:2D:93:75:B6:48:55:78:F8:2F:71:A1: AE:6E:EF:39:7D:29:7C:8A:E3:15:7B:CA:DE:E1:A0:1E Timestamp : Oct 30 20:26:38.651 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:F9:DE:E9:03:47:65:1A:15:D0:BD:0C: 5A:65:F9:09:F0:14:C3:15:28:F8:34:F4:7F:7B:00:B8: 19:BC:71:D8:99:02:21:00:FB:BE:13:42:39:6A:C7:76: B9:42:50:75:75:8A:9C:F0:2E:EC:5B:5E:80:18:47:C0: 9F:74:01:62:20:A3:EE:15
-----BEGIN CERTIFICATE-----
MIIE7TCCBHKgAwIBAgIQB6S56JKMX/Z4Y+6lG8ainjAKBggqhkjOPQQDAzBgMQsw
CQYDVQQGEwJHUjE3MDUGA1UECgwuSGVsbGVuaWMgQWNhZGVtaWMgYW5kIFJlc2Vh
cmNoIEluc3RpdHV0aW9ucyBDQTEYMBYGA1UEAwwPR0VBTlQgVExTIEVDQyAxMB4X
DTI2MTAzMDIwMTYzN1oXDTI3MDUxNzIwMTYzNlowezELMAkGA1UEBhMCREUxHDAa
BgNVBAgME05vcmRyaGVpbi1XZXN0ZmFsZW4xODA2BgNVBAoML1JoZWluaXNjaGUg
RnJpZWRyaWNoLVdpbGhlbG1zLVVuaXZlcnNpdGFldCBCb25uMRQwEgYDVQQDDAt1
bmktYm9ubi5kZTB2MBAGByqGSM49AgEGBSuBBAAiA2IABPG8wNl8+hC5UkKBU5Nf
fX6yF/460LuzHHfgXJ22mvcfZ13dGy4PPAcs+N0HWajHHHGuv1VbDMy84+/NZjPI
7cYGG/Mx2axYbDoW3GZW+vA2zZCTkx1FyyokokxkUhRfvKOCAtQwggLQMAwGA1Ud
EwEB/wQCMAAwHwYDVR0jBBgwFoAU6ZkGjRcfq/uWGlrIW15dXuzanI8wSAYIKwYB
BQUHAQEEPDA6MDgGCCsGAQUFBzAChixodHRwOi8vY3J0LmhhcmljYS5nci9IQVJJ
Q0EtR0VBTlQtVExTLUUxLmNlcjAWBgNVHREEDzANggt1bmktYm9ubi5kZTAtBgNV
HSAEJjAkMAgGBmeBDAECAjAIBgYEAI96AQcwDgYMKwYBBAGBzxEBAQECMB0GA1Ud
JQQWMBQGCCsGAQUFBwMCBggrBgEFBQcDATA9BgNVHR8ENjA0MDKgMKAuhixodHRw
Oi8vY3JsLmhhcmljYS5nci9IQVJJQ0EtR0VBTlQtVExTLUUxLmNybDAdBgNVHQ4E
FgQUDuiu2z/A1oQkHDEQQLl6E13jNLkwDgYDVR0PAQH/BAQDAgeAMIIBfwYKKwYB
BAHWeQIEAgSCAW8EggFrAWkAdgBGojlnxg22RofGbz35mZR2k6amESCEV9VV5+PQ
odm2RgAAAaGOfjajAAAEAwBHMEUCIQC8IpC5j6Efzkl39p3kTNaNexrsFk8MUZLn
ZGUm54/tLwIgYWo9bRLh+XCFlsRtSawH2R3ukApJ4sVz/V/JlEipRw4AdgBMY9yY
5Zwdq4j2Hoo93q6Pq0SjN3tfm5TD+6Gc/MG+JgAAAaGOfjcRAAAEAwBHMEUCIApC
puYVcCmVXHpEwH9axf1Uh08Z/WUY2xCRr4Gc0OtsAiEAvdHSdbbnXq7kLKP0zGEW
Au1bfJkSy9MK7/anKAq9PF0AdwAAGl0aHC2TdbZIVXj4L3Ghrm7vOX0pfIrjFXvK
3uGgHgAAAaGOfja7AAAEAwBIMEYCIQD53ukDR2UaFdC9DFpl+QnwFMMVKPg09H97
ALgZvHHYmQIhAPu+E0I5asd2uUJQdXWKnPAu7FtegBhHwJ90AWIgo+4VMAoGCCqG
SM49BAMDA2kAMGYCMQDt6F6nuArbIfKEY+XNzZfjxk0n+LCZGIx53VfT61/YtSgi
hxwY38RiFEM3+jArUf8CMQD4T+vY9brtxC+vI+TQcoiTtgUR6GrCUmflcJaG62NO
4uUZ6/KbInHiZP+Zxe1Zmk8=
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-31T13:33:47+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
4808
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
1034
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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