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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

mail3.blutspende.de · 37.16.65.3:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `mail3.blutspende.de'

Certificate verification failed

Subject
CN=mailsec.blutspende.de
Issuer
C=BE O=GlobalSign nv-sa CN=GlobalSign Atlas R46 DV TLS CA 2026 Q3
Valid from
2026-09-28T07:18:46+00:00
Expires
2027-04-15T07:18:45+00:00
Days remaining
177
Serial (hex)
015B67FBF53DE9C25E006FB4DA418656
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:mailsec.blutspende.de

SHA-256 fingerprint

00:BD:B7:90:C7:19:32:8D:63:10:4E:5B:B8:4F:79:8D:E8:5F:A1:EB:50:46:C8:63:C4:B6:40:F6:DD:04:95:A4
Certificate extensions & PEM
subjectAltName
DNS:mailsec.blutspende.de
keyUsage
Digital Signature
extendedKeyUsage
TLS Web Server Authentication
subjectKeyIdentifier
4B:91:98:CF:C9:47:6F:D6:12:D1:4C:E5:89:E7:47:97:8C:C5:1C:F7
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.4146.10.1.3 CPS: https://www.globalsign.com/repository/
basicConstraints
CA:FALSE
authorityInfoAccess
OCSP - URI:http://ocsp.globalsign.com/ca/gsatlasr46dvtlsca2026q3 CA Issuers - URI:http://secure.globalsign.com/cacert/gsatlasr46dvtlsca2026q3.crt
authorityKeyIdentifier
DC:52:7D:D4:10:17:BE:E5:FB:01:44:B0:FB:19:CA:C7:EE:D0:28:EB
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/ca/gsatlasr46dvtlsca2026q3.crl
ct_precert_scts
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 : Sep 28 07:18:51.099 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:69:8E:B3:A7:C3:EB:F8:61:54:50:40:FD: 6B:61:42:0F:D1:08:2C:87:6C:6F:4E:15:CF:E2:7D:F9: 63:E3:9B:61:02:21:00:8C:67:C7:AF:2F:27:50:11:A2: 99:61:80:C0:F0:CE:1B:8C:62:BF:BD:8C:DF:44:2B:F7: A2:0C:B9:B5:96:0F:70 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 : Sep 28 07:18:51.231 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:A4:00:5F:86:B1:70:69:02:34:55:33: B1:2D:36:06:75:C3:3F:BB:28:13:0C:A9:9A:D2:B7:5E: BA:7E:C3:F8:FB:02:20:7F:15:CD:23:09:6B:BF:99:E2: 77:A5:54:57:61:20:49:3A:52:1D:4B:2F:45:31:D4:9F: 6C:53:8D:E4:AC:AC:63 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Sep 28 07:18:51.861 2026 GMT Extensions: 00:00:05:00:16:CF:07:83 Signature : ecdsa-with-SHA256 30:44:02:20:3C:F4:B0:0A:A8:23:4C:C2:46:BC:1B:20: 04:C7:B7:FF:1E:C8:0E:10:D8:8E:9D:48:B7:9F:26:2F: 1C:C2:48:0A:02:20:37:48:ED:79:38:1E:9A:45:69:C0: AA:9F:52:C3:50:CE:3D:0C:31:42:A8:D6:82:65:BD:35: CF:98:62:2C:C2:B2
-----BEGIN CERTIFICATE-----
MIIIbjCCBlagAwIBAgIQAVtn+/U96cJeAG+02kGGVjANBgkqhkiG9w0BAQsFADBZ
MQswCQYDVQQGEwJCRTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEvMC0GA1UE
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rai+jL/0UKPUVNYdOwr0/5PoqqgmurAzVkM1nTL4iytyWjBYsvUpA/BboFzw4uo6
MBJnaGleQFYboABKFbSdRyNTHiTR4DdjAz2uz8rpqgyD/ewMfUYImdYtfOzY3yQt
FFlR3qdb9mGelBx09r9hR1Cx0qIcREq7u/i3mR6jZdqwcwwRrLD3kLypBDbUaECJ
fRbylXuKziM77Q9D7sClEpmIKzO5xiGWtD1UFY+1wUeOGLGlupC6Wa34mz9wthxv
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2I6dSLefJi8cwkgKAiA3SO15OB6aRWnAqp9Sw1DOPQwxQqjWgmW9Nc+YYizCsjAN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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-19T18:31:37+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=BE O=GlobalSign nv-sa CN=GlobalSign Atlas R46 DV TLS CA 2026 Q3
Issuer
C=BE O=GlobalSign nv-sa CN=GlobalSign Root R46
Valid from
2026-04-22T03:00:05+00:00
Expires
2028-04-22T00:00:00+00:00
Days remaining
550
Serial (hex)
85AC708351E68DF704248BFDF17E4272
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

99:AE:C9:2E:EA:8F:B5:36:F7:4D:FB:FB:82:44:E4:C8:F5:AC:3B:65:8F:7A:98:86:19:79:7A:4D:04:AC:10:36
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
DC:52:7D:D4:10:17:BE:E5:FB:01:44:B0:FB:19:CA:C7:EE:D0:28:EB
authorityKeyIdentifier
03:5C:AB:73:81:87:A8:CC:B0:A6:D5:94:E2:36:96:49:FF:05:99:2C
authorityInfoAccess
OCSP - URI:http://ocsp.globalsign.com/rootr46 CA Issuers - URI:http://secure.globalsign.com/cacert/rootr46.crt
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/rootr46.crl
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.4146.10.1.3
-----BEGIN CERTIFICATE-----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BgNVHSAEGjAYMAgGBmeBDAECATAMBgorBgEEAaAyCgEDMA0GCSqGSIb3DQEBDAUA
A4ICAQBYuEMqjS47yqkA3jH1Tp4wE1qQsAf5AtdDQgL4y0SOfy26mYqN2gJdTpFM
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NReBhcjLsA+fu2yxJbuqvG+nFw/jhBCvhVJ+VwDPppBQ62xqMpjC7klvKmkdB/Sl
jMeZoHtUWq9y7MKkez1MkQn6vp5aC6RxdtIDhX0uc4Yu34jV/yu9dcnu62gAyl5N
aZz6tM2kaMIlRKtirAmKoHFHok+4OfV+nYgxXEBch53I4GXqFBl1Y5laMhjiaZjy
+xYBUGAtfd/HdwYByoVYfZFBFhZcmWWSNbXvHEn6WW6UJ8NDSg==
-----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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