THE CERTIFICATE BEHIND THE CONNECTION

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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

cronon.de · 217.74.203.106:443

Unverified

Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

The certificate has expired.

Certificate verification failed

Subject: C=US O=Unspecified CN=cronon-web01 emailAddress=root@cronon-web01
Issuer: C=US O=Unspecified OU=ca-3229282819951432009 CN=cronon-web01 emailAddress=root@cronon-web01
Valid from: 2023-04-12T14:21:23+00:00
Expires: 2024-04-11T14:21:23+00:00
Days remaining: -892
Serial (hex): 48D199A8BDC45C58
Signature: RSA-SHA256
Public key: RSA 2048

Subject alternative names (SAN)

DNS:cronon-web01

SHA-256 fingerprint

EE:3F:2B:79:AC:E1:20:36:F7:73:4C:71:8D:E0:06:DE:3F:A1:4D:09:D4:59:A3:32:A2:66:A4:59:8B:D5:49:76

Certificate extensions & PEM

keyUsage: Digital Signature, Key Encipherment
extendedKeyUsage: TLS Web Server Authentication
basicConstraints: CA:FALSE
subjectAltName: DNS:cronon-web01
authorityKeyIdentifier: EB:DA:D5:23:09:F6:0C:D1:C2:5C:50:6A:64:A0:04:1E:7E:45:1E:56

-----BEGIN CERTIFICATE-----
MIIExzCCAq+gAwIBAgIISNGZqL3EXFgwDQYJKoZIhvcNAQELBQAwfTELMAkGA1UE
BhMCVVMxFDASBgNVBAoMC1Vuc3BlY2lmaWVkMR8wHQYDVQQLDBZjYS0zMjI5Mjgy
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HieGeok5VHPx9Cw5jmkudr1LJQC2HS7EP+IkkBr9k2p2NXYZUAAX6fyFumiWHy8D
kvICbgK+tU/YIa+7SSjdsHRg3UsZGa58JstcXnPdx+kz8YIUUJXoPgswMOf8fvJi
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ClnvLdcXKWuByd5z64IzLz/cvQWy/dkwJbvRrvyetKEy/qjVAMmA0IQMiK5x/C5N
CsCN9wIDAQABo2wwajAOBgNVHQ8BAf8EBAMCBaAwEwYDVR0lBAwwCgYIKwYBBQUH
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Ywu7jimAAErauiFvpgP6qBzxAU5MYZcnggDZMSJa6eszWlIvlxwhbCv8JN+rXsko
rWN4cOMM7oOpcj6iYGdN5pEW9z7PMch4kRin1bI9gqE4GlW7nPOLSF5/9vvHnLnp
d56wIdCj59/1MlPi/oQEhUvc65jKQ33ldlRk
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-20T09:14:46+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject: C=US O=Unspecified OU=ca-3229282819951432009 CN=cronon-web01 emailAddress=root@cronon-web01
Issuer: C=US O=Unspecified OU=ca-3229282819951432009 CN=cronon-web01 emailAddress=root@cronon-web01
Valid from: 2023-04-12T14:21:23+00:00
Expires: 2024-04-11T14:21:23+00:00
Days remaining: -892
Serial (hex): 2CD0B79D827A1149
Signature: RSA-SHA256
Public key: RSA 4096

Subject alternative names (SAN)

DNS:cronon-web01

SHA-256 fingerprint

3B:E1:F8:34:CE:04:24:85:77:28:C5:7C:08:9D:4E:BA:EE:3F:0B:90:A9:C3:EA:22:D8:2B:B2:BB:2D:E3:3C:C2

Certificate extensions & PEM

keyUsage: Digital Signature, Key Encipherment, Certificate Sign
basicConstraints: CA:TRUE
nameConstraints: Permitted: DNS:cronon-web01
subjectAltName: DNS:cronon-web01
subjectKeyIdentifier: EB:DA:D5:23:09:F6:0C:D1:C2:5C:50:6A:64:A0:04:1E:7E:45:1E:56

-----BEGIN CERTIFICATE-----
MIIF8TCCA9mgAwIBAgIILNC3nYJ6EUkwDQYJKoZIhvcNAQELBQAwfTELMAkGA1UE
BhMCVVMxFDASBgNVBAoMC1Vuc3BlY2lmaWVkMR8wHQYDVQQLDBZjYS0zMjI5Mjgy
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VQQLDBZjYS0zMjI5MjgyODE5OTUxNDMyMDA5MRUwEwYDVQQDDAxjcm9ub24td2Vi
MDExIDAeBgkqhkiG9w0BCQEWEXJvb3RAY3Jvbm9uLXdlYjAxMIICIjANBgkqhkiG
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C+uNP+a4fnmU/K6yyaX6fW8MVVP9hUaYogE9te9Igg92IZ9EY6ISgbiAtklGElCi
AC4zeYeOCO/OnnSFh/nE6Gb2w0V2CY07R+OjDGLq0+Sb+rt2k9siBqJCxTdh6oHl
ph91Oc7fGYEjXeaPZFiisYMRtn1fPixBrSE+RXM2jkT/+kmbqg==
-----END CERTIFICATE-----

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

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