THE CERTIFICATE BEHIND THE CONNECTION

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Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

colocenter.nl · 5.39.184.4:443

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

Certificate verification failed

Subject: C=US O=Unspecified CN=5-39-184-4 emailAddress=root@5-39-184-4.colocenter.nl
Issuer: C=US O=Unspecified OU=ca-2678356665804571873 CN=5-39-184-4 emailAddress=root@5-39-184-4.colocenter.nl
Valid from: 2025-12-15T12:49:54+00:00
Expires: 2026-12-15T12:49:54+00:00
Days remaining: 71
Serial (hex): 5D41F1CE0C0DCEA3
Signature: RSA-SHA256
Public key: RSA 2048

Subject alternative names (SAN)

DNS:5-39-184-4, DNS:5-39-184-4.colocenter.nl

SHA-256 fingerprint

96:53:7F:33:F2:A3:A5:12:74:D1:82:92:6F:DA:5C:C0:B7:22:D6:FD:1A:DA:3A:66:FD:D4:BD:B0:29:55:C9:6E

Certificate extensions & PEM

keyUsage: Digital Signature, Key Encipherment
extendedKeyUsage: TLS Web Server Authentication
basicConstraints: CA:FALSE
subjectAltName: DNS:5-39-184-4, DNS:5-39-184-4.colocenter.nl
authorityKeyIdentifier: D2:70:A5:BC:C3:C5:0E:1B:60:30:7A:71:4E:4C:EB:F3:23:24:1A:0C

-----BEGIN CERTIFICATE-----
MIIE9jCCAt6gAwIBAgIIXUHxzgwNzqMwDQYJKoZIhvcNAQELBQAwgYcxCzAJBgNV
BAYTAlVTMRQwEgYDVQQKDAtVbnNwZWNpZmllZDEfMB0GA1UECwwWY2EtMjY3ODM1
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t/voGqmw9i13HunA+nndb5GlpMfnlh0ItpNzWcqi5cdNHV5Zc641bVnZ3wmaX0pJ
GakCDf2bxSV42RFTqn6hhUOx9amPwNY0O7A=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-05T02:53:56+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject: C=US O=Unspecified OU=ca-2678356665804571873 CN=5-39-184-4 emailAddress=root@5-39-184-4.colocenter.nl
Issuer: C=US O=Unspecified OU=ca-2678356665804571873 CN=5-39-184-4 emailAddress=root@5-39-184-4.colocenter.nl
Valid from: 2025-12-15T12:49:54+00:00
Expires: 2026-12-15T12:49:54+00:00
Days remaining: 71
Serial (hex): 252B6F326F14C4E1
Signature: RSA-SHA256
Public key: RSA 4096

Subject alternative names (SAN)

DNS:5-39-184-4, DNS:5-39-184-4.colocenter.nl

SHA-256 fingerprint

37:1F:0B:FA:7B:23:A5:88:2B:AB:B4:F3:9A:74:57:6E:1F:AB:16:39:25:03:C5:98:B9:7F:55:EC:BC:7E:98:1B

Certificate extensions & PEM

keyUsage: Digital Signature, Key Encipherment, Certificate Sign
basicConstraints: CA:TRUE
nameConstraints: Permitted: DNS:5-39-184-4 DNS:5-39-184-4.colocenter.nl
subjectAltName: DNS:5-39-184-4, DNS:5-39-184-4.colocenter.nl
subjectKeyIdentifier: D2:70:A5:BC:C3:C5:0E:1B:60:30:7A:71:4E:4C:EB:F3:23:24:1A:0C

-----BEGIN CERTIFICATE-----
MIIGPjCCBCagAwIBAgIIJStvMm8UxOEwDQYJKoZIhvcNAQELBQAwgYcxCzAJBgNV
BAYTAlVTMRQwEgYDVQQKDAtVbnNwZWNpZmllZDEfMB0GA1UECwwWY2EtMjY3ODM1
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28/uW4ScObz+C0i0bGOBooR/
-----END CERTIFICATE-----

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

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