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

TLSv1.2

mail.ilv.tw · 61.216.131.128:443

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
OU=Domain Control Validated PositiveSSL CN=itn.tw
Issuer
C=GB ST=Greater Manchester L=Salford O=COMODO CA Limited CN=COMODO RSA Domain Validation Secure Server CA
Valid from
2014-10-02T00:00:00+00:00
Expires
2019-10-01T23:59:59+00:00
Days remaining
-2591
Serial (hex)
E25A2B1CFC57E88DC8F166AF37706208
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:itn.tw, DNS:www.itn.tw

SHA-256 fingerprint

12:AD:85:C6:F7:43:70:90:89:5D:7A:AE:33:70:DC:1D:A7:00:58:F6:3A:D8:89:15:49:B2:D4:6F:51:7A:86:59
Certificate extensions & PEM
authorityKeyIdentifier
90:AF:6A:3A:94:5A:0B:D8:90:EA:12:56:73:DF:43:B4:3A:28:DA:E7
subjectKeyIdentifier
1B:60:56:46:AF:CA:9F:3C:DE:34:47:F1:D5:4F:E5:FF:56:2E:34:2A
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.7 CPS: https://secure.comodo.com/CPS Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://crl.comodoca.com/COMODORSADomainValidationSecureServerCA.crl
authorityInfoAccess
CA Issuers - URI:http://crt.comodoca.com/COMODORSADomainValidationSecureServerCA.crt OCSP - URI:http://ocsp.comodoca.com
subjectAltName
DNS:itn.tw, DNS:www.itn.tw
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-04T05:58:05+00:00

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

View certificate JSON

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