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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

csd.net · 198.80.11.49:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `csd.net'

Certificate verification failed

Subject
C=US ST=Colorado O=Computer Systems Design CN=*.csdco.com
Issuer
C=US O=Network Solutions, LLC CN=Network Solutions RSA OV SSL CA 4
Valid from
2026-05-20T00:00:00+00:00
Expires
2026-12-04T23:59:59+00:00
Days remaining
46
Serial (hex)
9999639A196738D5F85FC2D99BA54A05
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.csdco.com, DNS:csdco.com

SHA-256 fingerprint

D2:39:A0:84:3D:FE:31:52:D1:BD:3F:4C:40:9A:DE:BD:41:D8:6C:AE:BB:E9:01:7B:ED:4D:CF:14:97:B9:31:2A
Certificate extensions & PEM
authorityKeyIdentifier
69:2D:D8:C4:6A:8A:D8:38:1D:E8:52:EB:6B:53:C8:A1:11:66:54:EF
subjectKeyIdentifier
4B:E7:58:B8:04:AA:3F:CE:FB:AD:30:39:08:F2:ED:CB:9C:48:24:DA
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/NetworkSolutionsRSAOVSSLCA4.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/NetworkSolutionsRSAOVSSLCA4.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:*.csdco.com, DNS:csdco.com
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : May 20 20:23:52.016 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:93:4C:6F:9D:38:9A:38:2A:0F:24:6E: 52:70:93:3F:22:FE:7D:D8:DC:34:A7:03:3F:50:D9:F4: 91:4D:8E:A0:B7:02:20:52:18:A5:54:22:51:47:2F:74: 01:50:4A:37:56:FC:90:B3:FD:26:F5:10:92:AE:F7:9E: AD:E3:4E:54:C6:B5:21 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : May 20 20:23:51.984 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:5B:33:01:D5:54:F5:B6:53:79:C3:6E:9F: 9A:68:8A:8F:EA:35:AE:96:42:A8:45:E8:58:56:96:C9: 79:6F:F7:8B:02:21:00:A0:60:66:E4:57:D6:4D:9B:FD: 1C:00:A8:75:B9:9A:2A:1C:88:9F:4A:E3:2C:CB:4C:2A: 2A:C9:32:5D:A9:57:F6 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9: 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A Timestamp : May 20 20:23:52.151 2026 GMT Extensions: 00:00:05:00:0C:7B:6D:88 Signature : ecdsa-with-SHA256 30:46:02:21:00:A5:E3:B8:5F:D3:0B:79:EE:2C:8C:46: 7E:E6:5D:F7:66:8B:C8:AE:7C:EA:3B:CC:93:76:33:20: 25:61:92:ED:B7:02:21:00:86:DE:64:62:18:8A:01:62: 05:57:C8:F0:83:18:4C:DB:0C:20:E8:08:36:04:1D:D2: 9D:F0:54:FC:58:8E:69:46
-----BEGIN CERTIFICATE-----
MIIGuzCCBSOgAwIBAgIRAJmZY5oZZzjV+F/C2ZulSgUwDQYJKoZIhvcNAQELBQAw
WjELMAkGA1UEBhMCVVMxHzAdBgNVBAoTFk5ldHdvcmsgU29sdXRpb25zLCBMTEMx
KjAoBgNVBAMTIU5ldHdvcmsgU29sdXRpb25zIFJTQSBPViBTU0wgQ0EgNDAeFw0y
NjA1MjAwMDAwMDBaFw0yNjEyMDQyMzU5NTlaMFgxCzAJBgNVBAYTAlVTMREwDwYD
VQQIEwhDb2xvcmFkbzEgMB4GA1UEChMXQ29tcHV0ZXIgU3lzdGVtcyBEZXNpZ24x
FDASBgNVBAMMCyouY3NkY28uY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB
CgKCAQEApx0dOFO51pKZL8AScS76/GrQOPGDQp3QlcE0uYS3LU3W8o4r4D5MWVK4
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q7x+mXZIYBH14vdLSAKYKNXGlqqNhiTzl/kAFwxWZv41dgX6vaqKw5tWoGZkpn1o
Q70HTrCG4Wp21HSTV2I/HnLkRcRGkLYcBJFAwdOOCm65gfJLBXcHCQC0q8XkDd3q
pijAHBjJswvDWl3JqYUxTmkUww8C3/3tcENnEHUFdPfOi9/yKfpyTEWe6kz7cHWS
5k9h6Ib9v3hh+X7gyMDAnDKn0bb/5QIDAQABo4IC/DCCAvgwHwYDVR0jBBgwFoAU
aS3YxGqK2Dgd6FLra1PIoRFmVO8wHQYDVR0OBBYEFEvnWLgEqj/O+60wOQjy7cuc
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AQUFBwMBMBMGA1UdIAQMMAowCAYGZ4EMAQICMEcGA1UdHwRAMD4wPKA6oDiGNmh0
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by5jb22CCWNzZGNvLmNvbTCCAYcGCisGAQQB1nkCBAIEggF3BIIBcwFxAHYA1219
ENGn9XfCx+lf1wC/+YLJM1pl4dCzAXMXwMjFaXcAAAGeRw8X0AAABAMARzBFAiEA
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dZkdz5oAAAGeRw8XsAAABAMARzBFAiBbMwHVVPW2U3nDbp+aaIqP6jWulkKoRehY
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GUOoXqkWvFLRM+TcyR7xQRx9JYQg0XOAnhgY6zoAAAGeRw8YVwAIAAAFAAx7bYgE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=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-19T07:19:57+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Network Solutions, LLC CN=Network Solutions RSA OV SSL CA 4
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Valid from
2025-08-20T00:00:00+00:00
Expires
2035-08-19T23:59:59+00:00
Days remaining
3226
Serial (hex)
FD9B39E0ECF746CD14312860C8AE8E75
Signature
RSA-SHA384
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

22:A9:F7:26:E8:F7:85:A7:66:A4:4D:A2:B0:3A:61:45:C2:A0:83:17:D7:35:AB:59:6F:7A:32:9C:37:D5:D0:C2
Certificate extensions & PEM
authorityKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
subjectKeyIdentifier
69:2D:D8:C4:6A:8A:D8:38:1D:E8:52:EB:6B:53:C8:A1:11:66:54:EF
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationRootR46.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationRootR46.p7c OCSP - URI:http://ocsp.sectigo.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

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

View certificate JSON

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