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

postmaster3.netcon.co.za · 196.3.115.55:443

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=CA ST=Ontario L=Ottawa O=Placeholder CN=postmaster5
Issuer
C=CA ST=Ontario L=Ottawa O=Placeholder CN=postmaster5
Valid from
2021-07-19T12:31:14+00:00
Expires
2035-03-28T12:31:14+00:00
Days remaining
3092
Serial (hex)
BCFC033609F65396
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

5F:CF:92:BD:77:D2:22:CB:D0:FD:00:02:11:FB:DB:34:89:50:6D:00:B1:D9:28:D5:DE:BE:70:49:CE:52:D2:3B
Certificate extensions & PEM
subjectKeyIdentifier
70:DA:82:2F:C5:BB:F8:4A:B9:9E:18:B3:1C:FB:4D:4C:4E:4B:A2:93
authorityKeyIdentifier
70:DA:82:2F:C5:BB:F8:4A:B9:9E:18:B3:1C:FB:4D:4C:4E:4B:A2:93
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----
MIIDjjCCAnagAwIBAgIJALz8AzYJ9lOWMA0GCSqGSIb3DQEBCwUAMFwxCzAJBgNV
BAYTAkNBMRAwDgYDVQQIDAdPbnRhcmlvMQ8wDQYDVQQHDAZPdHRhd2ExFDASBgNV
BAoMC1BsYWNlaG9sZGVyMRQwEgYDVQQDDAtwb3N0bWFzdGVyNTAeFw0yMTA3MTkx
MjMxMTRaFw0zNTAzMjgxMjMxMTRaMFwxCzAJBgNVBAYTAkNBMRAwDgYDVQQIDAdP
bnRhcmlvMQ8wDQYDVQQHDAZPdHRhd2ExFDASBgNVBAoMC1BsYWNlaG9sZGVyMRQw
EgYDVQQDDAtwb3N0bWFzdGVyNTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC
ggEBAMKcb3qzvJXthi0vUAoZgL2iTjU73ip2e0SY2lvQhuVG9zd7zyGg6NFv4UGo
4mz4f5TTjgjwQOM9u2RpNFS9bNM+n/NXfyxtShcttyMgGAv+Pjczp83GnNL4a6jj
MhY1w1Ibdzu4MaNH72tAwM8wYtj4GMROuOI8HM3kzTjFiIG+6KBy0BzIUn8ms1vV
kBwZ5xb4/QVR1i8AvIcQ/5eA9/M12q1+DX9y8r5hWFjB7TXA4EJWrDYIpL6DJig4
MPEx4WMpZPO2TAYIDb2TtYmdzdUAn28Z+BNANvDTLC1LfhKdyKc6DnKcxa14leuO
E8TGxafymbhrRX+kMqTJ3whhyRMCAwEAAaNTMFEwHQYDVR0OBBYEFHDagi/Fu/hK
uZ4Ysxz7TUxOS6KTMB8GA1UdIwQYMBaAFHDagi/Fu/hKuZ4Ysxz7TUxOS6KTMA8G
A1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEBAHTJOJ/u3caJF/66rrIs
l2AMycO0n6NLlOeVffiHr9SZe67F9zmvu921m7jKu6UBGMXnoC56CfRo1WN4HXMU
KzVN27607TorYuy56c8VNpysofJy5eYgNU6dMlugZjmN9Ihk/WZJ0BiBOZjHQwny
Rhx0g2BOM3lIHAR3o3mXIw3sSoB5krKMMUC+dcKHcEdCMMKdzTs9f0VuoY/KlL62
bDeR52Iss/105ra/ci5UlYKfc4pDT/oowTI868bfnvvPORtwBfkSfgvMRZGoZ86M
u7x6lja2GQttbT4AQpGYgQ1oMS4gw/kG8oiw7sOy/UxX3EtQxNcudKzcWppEASr2
igU=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-08T18:38:15+00:00

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

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