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

opti9tech.com · 209.200.45.50:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=*.opti9tech.com
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2026-01-04T00:00:00+00:00
Expires
2027-02-04T23:59:59+00:00
Days remaining
102
Serial (hex)
8CF77C5D161DF5789F00FC565E43D09F
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.opti9tech.com, DNS:opti9tech.com

SHA-256 fingerprint

3F:61:53:0F:AD:AC:3B:11:12:9E:44:C5:BB:2B:77:F6:9F:F7:82:5A:89:11:02:6B:1F:B9:53:A3:79:5E:56:88
Certificate extensions & PEM
authorityKeyIdentifier
68:C0:12:16:18:0E:AF:CE:F6:87:A6:32:57:A3:46:51:5D:CB:07:27
subjectKeyIdentifier
42:BA:C1:F6:10:26:8C:BD:DE:B3:66:C2:EE:EE:D7:28:6C:61:65:A0
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.7 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCADVR36.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:*.opti9tech.com, DNS:opti9tech.com
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Jan 4 15:30:41.745 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:E7:66:B6:75:B6:D0:91:5A:80:1E:DA: 19:9E:B6:74:78:2C:21:50:89:07:10:5C:DA:A6:8F:4A: 7A:74:C9:5C:EF:02:21:00:EE:11:06:C5:AC:AC:6E:E1: 7A:D7:B1:02:66:03:72:CB:22:80:BF:CE:61:57:EA:1F: 8E:90:74:C7:CB:82:D9:1C Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Jan 4 15:30:42.185 2026 GMT Extensions: 00:00:05:00:01:0B:EA:9B Signature : ecdsa-with-SHA256 30:45:02:20:26:88:F5:E1:B8:97:DF:1A:21:47:8F:95: 8E:49:03:1D:87:ED:5A:6A:57:E8:AB:4C:28:F7:15:87: CD:98:6C:0F:02:21:00:86:56:A9:30:7D:8C:F9:6A:6B: 0C:F4:CB:CA:B7:C1:EC:62:69:95:4F:AF:BA:87:69:BF: 31:5C:F5:D3:04:5E:16 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Jan 4 15:30:42.050 2026 GMT Extensions: 00:00:05:00:00:07:7C:90 Signature : ecdsa-with-SHA256 30:46:02:21:00:B2:98:E8:3E:81:B9:6F:40:46:9A:7A: A3:32:E4:50:A4:8C:5E:0C:24:C2:86:14:89:01:21:83: 77:8F:9F:DD:7F:02:21:00:B0:00:C1:59:B3:EC:82:DD: 2B:3F:0E:80:EF:4D:4A:A2:C1:13:B7:06:2F:1F:BC:57: 14:2A:5A:C9:65:83:86:3F
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-25T13:17:53+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Valid from
2021-03-22T00:00:00+00:00
Expires
2036-03-21T23:59:59+00:00
Days remaining
3435
Serial (hex)
397A66CC2756362E0DAA87CA6EABE3B1
Signature
RSA-SHA384
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

8C:54:C3:34:B6:6B:A4:E4:26:77:2A:F4:A3:F9:13:6C:19:A1:AE:C7:29:FD:B2:8C:53:5C:07:A5:A4:EF:22:E0
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
68:C0:12:16:18:0E:AF:CE:F6:87:A6:32:57:A3:46:51:5D:CB:07:27
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy Policy: 2.23.140.1.2.1
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-----

Chain certificate 2

Subject
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Issuer
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Valid from
2010-02-01T00:00:00+00:00
Expires
2038-01-18T23:59:59+00:00
Days remaining
4103
Serial (hex)
01FD6D30FCA3CA51A81BBC640E35032D
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

E7:93:C9:B0:2F:D8:AA:13:E2:1C:31:22:8A:CC:B0:81:19:64:3B:74:9C:89:89:64:B1:74:6D:46:C3:D4:CB:D2
Certificate extensions & PEM
subjectKeyIdentifier
53:79:BF:5A:AA:2B:4A:CF:54:80:E1:D8:9B:C0:9D:F2:B2:03:66:CB
keyUsage
Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----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c0Plfg6lZrEpfDKEY1WJxA3Bk1QwGROs0303p+tdOmw1XNtB1xLaqUkL39iAigmT
Yo61Zs8liM2EuLE/pDkP2QKe6xJMlXzzawWpXhaDzLhn4ugTncxbgtNMs+1b/97l
c6wjOy0AvzVVdAlJ2ElYGn+SNuZRkg7zJn0cTRe8yexDJtC/QV9AqURE9JnnV4ee
UB9XVKg+/XRjL7FQZQnmWEIuQxpMtPAlR1n6BB6T1CZGSlCBst6+eLf8ZxXhyVeE
Hg9j1uliutZfVS7qXMYoCAQlObgOK6nyTJccBz8NUvXt7y+CDwIDAQABo0IwQDAd
BgNVHQ4EFgQUU3m/WqorSs9UgOHYm8Cd8rIDZsswDgYDVR0PAQH/BAQDAgEGMA8G
A1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcNAQEMBQADggIBAFzUfA3P9wF9QZllDHPF
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ATiUFJVDBwn7YKnuHKsSjKCaXqeYalltiz8I+8jRRa8YFWSQEg9zKC7F4iRO/Fjs
8PRF/iKz6y+O0tlFYQXBl2+odnKPi4w2r78NBc5xjeambx9spnFixdjQg3IM8WcR
iQycE0xyNN+81XHfqnHd4blsjDwSXWXavVcStkNr/+XeTWYRUc+ZruwXtuhxkYze
Sf7dNXGiFSeUHM9h4ya7b6NnJSFd5t0dCy5oGzuCr+yDZ4XUmFF0sbmZgIn/f3gZ
XHlKYC6SQK5MNyosycdiyA5d9zZbyuAlJQG03RoHnHcAP9Dc1ew91Pq7P8yF1m9/
qS3fuQL39ZeatTXaw2ewh0qpKJ4jjv9cJ2vhsE/zB+4ALtRZh8tSQZXq9EfX7mRB
VXyNWQKV3WKdwrnuWih0hKWbt5DHDAff9Yk2dDLWKMGwsAvgnEzDHNb842m1R0aB
L6KCq9NjRHDEjf8tM7qtj3u1cIiuPhnPQCjY/MiQu12ZIvVS5ljFH4gxQ+6IHdfG
jjxDah2nGN59PRbxYvnKkKj9
-----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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