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

cprm.net · 195.8.0.53:443

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=PT ST=Lisbon L=Linda-a-Velha O=Altice Internaciol Backbone OU=CPRM CN=www.cprm.net emailAddress=webmaster@cprm.net
Issuer
C=PT ST=Lisbon L=Linda-a-Velha O=Altice Internaciol Backbone OU=CPRM CN=www.cprm.net emailAddress=webmaster@cprm.net
Valid from
2021-01-12T15:10:07+00:00
Expires
2031-01-10T15:10:07+00:00
Days remaining
1556
Serial (hex)
3D6E0AB58EE772C03B7672E0CF767EC284AE3DA4
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

06:49:B3:16:19:A4:8B:05:A7:57:25:13:AA:70:E7:37:AB:89:0C:05:E9:EA:24:9A:F3:3E:6E:E5:7D:B4:4D:1B
Certificate extensions & PEM
subjectKeyIdentifier
4F:D9:DA:15:A3:CF:F3:62:3E:F8:CF:D7:05:57:A3:6F:1A:A4:3A:89
authorityKeyIdentifier
4F:D9:DA:15:A3:CF:F3:62:3E:F8:CF:D7:05:57:A3:6F:1A:A4:3A:89
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----
MIIELTCCAxWgAwIBAgIUPW4KtY7ncsA7dnLgz3Z+woSuPaQwDQYJKoZIhvcNAQEL
BQAwgaUxCzAJBgNVBAYTAlBUMQ8wDQYDVQQIDAZMaXNib24xFjAUBgNVBAcMDUxp
bmRhLWEtVmVsaGExJDAiBgNVBAoMG0FsdGljZSBJbnRlcm5hY2lvbCBCYWNrYm9u
ZTENMAsGA1UECwwEQ1BSTTEVMBMGA1UEAwwMd3d3LmNwcm0ubmV0MSEwHwYJKoZI
hvcNAQkBFhJ3ZWJtYXN0ZXJAY3BybS5uZXQwHhcNMjEwMTEyMTUxMDA3WhcNMzEw
MTEwMTUxMDA3WjCBpTELMAkGA1UEBhMCUFQxDzANBgNVBAgMBkxpc2JvbjEWMBQG
A1UEBwwNTGluZGEtYS1WZWxoYTEkMCIGA1UECgwbQWx0aWNlIEludGVybmFjaW9s
IEJhY2tib25lMQ0wCwYDVQQLDARDUFJNMRUwEwYDVQQDDAx3d3cuY3BybS5uZXQx
ITAfBgkqhkiG9w0BCQEWEndlYm1hc3RlckBjcHJtLm5ldDCCASIwDQYJKoZIhvcN
AQEBBQADggEPADCCAQoCggEBAOqJYicv1JiqcMfGul51HnLpLQ0CX3oLxOrF2LlV
NjD6lihSlVy6IsRLI7xQuEcZi0/ONm3eHd4YpTfvlEER6jxbAE52BRyLaQJJlpI9
jgyvFKoPdpJ6u34vCSyxfSg5MOGonjSd1su3sPGkTBy7gd0aKsS2scVaETvQdNZ6
w32V55JwLxB+vI+hqIwhnHUJmKQdi3JuEU/gGCMAM5QIgURzcBUG6P9h1vQ4xORX
Niq4l22ihTaCge7qY+4/Be+uxy5qCFFvU1yAjQbc0+5Z1avysR8jJD5sG8Mzx+Rk
xa8cQd3K6okVwxCshJHmdVL9P2ZVQYmGHF5ifNjQcUW0GIMCAwEAAaNTMFEwHQYD
VR0OBBYEFE/Z2hWjz/NiPvjP1wVXo28apDqJMB8GA1UdIwQYMBaAFE/Z2hWjz/Ni
PvjP1wVXo28apDqJMA8GA1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEB
AFX66JoCiVjRkKTN19UEMO8hphT6jZmk7MLUnv+r5aOmLRRfgSR/H0KRhDzML3zq
DdAr+NIH1QuQtMXgrpsaSp7PErkY4vJv2AkwbnRJAoZwB/S5uTD3UF6+lvJLAOZV
6SZjOooOpFcdAMLeTAHrOCVWUfrtEughGb/F5qwKIP/SwO1Zdn3XyL46fSNopg9p
Tj4yr/KSfvxW0OaRPbPHIbGXYZRRdCT97yNCFLTDQjRqGpURAIr7yv+9yL1i9Rfc
HAb7a439fCEy+x2l01FaGe7uDcZFXYFq2lFN/weJp+h91LXBaLj00yXXaLB0vL2k
0NkDbHf6lqNhq00EVwWMuJ4=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-07T06:39:18+00:00

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

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