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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

tm21.com · 27.96.130.192:443

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
CN=*.zeons.co.kr
Issuer
C=LV O=GoGetSSL CN=GoGetSSL RSA DV SSL CA 2
Valid from
2026-10-06T00:00:00+00:00
Expires
2027-04-22T23:59:59+00:00
Days remaining
163
Serial (hex)
6691DDE08A6F3977ECF8E2E63A189941
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.zeons.co.kr, DNS:zeons.co.kr

SHA-256 fingerprint

0A:41:F2:F4:40:37:5D:4B:1F:45:82:D6:16:26:FC:6B:26:D5:3E:DE:51:78:D8:4B:80:E9:50:68:39:57:DD:AB
Certificate extensions & PEM
authorityKeyIdentifier
A2:39:94:D8:27:B0:8E:0A:F8:E8:EA:1A:37:7D:EB:C2:E1:77:A9:8D
subjectKeyIdentifier
EB:5E:E5:54:28:14:5C:55:88:3C:AD:7D:95:D1:81:B2:9D:21:0D:1F
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/GoGetSSLRSADVSSLCA2.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:*.zeons.co.kr, DNS:zeons.co.kr
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A2:39:67:C6:0D:B6:46:87:C6:6F:3D:F9:99:94:76: 93:A6:A6:11:20:84:57:D5:55:E7:E3:D0:A1:D9:B6:46 Timestamp : Oct 6 01:58:39.844 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:28:10:83:B1:F8:64:37:D1:77:56:CB:89: FC:AE:55:A3:B2:63:CF:16:4A:B8:E3:C4:5C:75:FD:7F: DC:48:89:F0:02:20:72:F0:E1:5B:74:C8:F0:A7:6D:53: A7:A8:9A:FF:8C:AB:DF:3F:E0:AE:BB:E4:1A:60:AE:03: AA:B4:02:ED:A7:38 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 00:1A:5D:1A:1C:2D:93:75:B6:48:55:78:F8:2F:71:A1: AE:6E:EF:39:7D:29:7C:8A:E3:15:7B:CA:DE:E1:A0:1E Timestamp : Oct 6 01:58:39.865 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:56:15:F6:AA:FF:48:BE:8D:96:C4:C0:C3: 98:04:91:7C:76:F5:43:E2:2F:56:8A:19:CC:48:03:A0: A7:1A:89:FB:02:20:73:18:9C:38:69:47:6D:BD:0E:62: BF:CB:6A:79:61:27:2A:EE:E2:75:13:FB:BE:56:6C:46: 4F:45:09:28:B0:A6 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 : Oct 6 01:58:39.861 2026 GMT Extensions: 00:00:05:00:1D:39:C8:7D Signature : ecdsa-with-SHA256 30:45:02:20:42:AC:30:D0:82:19:A1:32:28:FB:53:48: 45:30:55:DC:03:2B:F2:C5:D8:30:C0:1A:76:3E:6E:DF: 43:75:0D:34:02:21:00:9F:48:AD:7A:FE:4D:20:37:B3: 85:9C:1D:69:99:BC:0D:57:44:8D:39:A1:45:BA:B9:75: F9:B9:FA:E5:3A:A0:33
-----BEGIN CERTIFICATE-----
MIIGEzCCBHugAwIBAgIQZpHd4IpvOXfs+OLmOhiZQTANBgkqhkiG9w0BAQsFADBD
MQswCQYDVQQGEwJMVjERMA8GA1UEChMIR29HZXRTU0wxITAfBgNVBAMTGEdvR2V0
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9T3Dx2zqWruA4IruGgLLK2aobyQqoNw=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-11-10T14:31:14+00:00

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

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