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

clickdomain.co.kr · 203.217.209.50:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `clickdomain.co.kr'
The certificate expires within 30 days.

Certificate verification failed

Subject
C=KR ST=Gyeonggi-do O=DAOU TECHNOLOGY INC CN=www.halfdomain.co.kr
Issuer
C=GB ST=Greater Manchester L=Salford O=Sectigo Limited CN=Sectigo RSA Organization Validation Secure Server CA
Valid from
2025-11-18T00:00:00+00:00
Expires
2026-11-18T23:59:59+00:00
Days remaining
20
Serial (hex)
93F8A695F65BF12A9AA4CB55E7618851
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:www.halfdomain.co.kr, DNS:halfdomain.co.kr

SHA-256 fingerprint

9E:F2:CA:47:E4:15:15:2A:0F:F2:B0:02:77:E4:DE:83:CA:18:A7:E2:AA:BC:A9:D2:00:1D:BA:01:86:9A:59:A1
Certificate extensions & PEM
authorityKeyIdentifier
17:D9:D6:25:27:67:F9:31:C2:49:43:D9:30:36:44:8C:6C:A9:4F:EB
subjectKeyIdentifier
F3:B0:26:09:0B:9D:1F:CA:A9:72:69:D3:9B:C4:40:64:50:EC:63:96
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.1.3.4 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoRSAOrganizationValidationSecureServerCA.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoRSAOrganizationValidationSecureServerCA.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:www.halfdomain.co.kr, DNS:halfdomain.co.kr
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Nov 18 15:05:28.441 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F4:E4:7F:6A:5E:14:10:89:60:9D:C1: 01:65:AB:0F:13:16:18:D2:85:86:7A:57:E9:72:BA:60: 7D:EC:C7:20:C6:02:20:0B:01:E5:F4:57:44:7F:9A:FE: 28:B1:E5:5F:4F:5C:2B:5D:5A:52:5A:A6:B7:3A:05:CB: 7E:AB:F7:E7:F9:A1:DB Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Nov 18 15:05:28.582 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:CD:77:30:9A:C3:25:CA:B5:94:D3:15: 40:D8:D3:E2:5B:2B:4F:F4:51:4E:6E:D6:C9:38:A4:BC: ED:24:68:2E:D1:02:20:30:A1:E1:17:D2:6E:98:59:58: 99:D0:7B:9B:90:01:27:F2:5A:00:27:EA:20:2C:BB:F6: A8:F4:47:AB:82:D6:70 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Nov 18 15:05:28.339 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:1F:EE:70:9C:6B:B6:DC:5A:43:E0:FC:B3: 55:C4:7C:B9:A5:8E:4F:09:58:0E:EC:A3:FB:41:DC:11: 88:8F:45:AA:02:21:00:9C:CF:33:3F:D1:3D:86:69:87: F7:37:A8:D1:B3:67:C7:29:13:E1:F1:04:82:8F:64:D6: 08:4B:B2:FA:FA:50:56
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: AES128-SHA · Checked 2026-10-29T02:11:16+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GB ST=Greater Manchester L=Salford O=Sectigo Limited CN=Sectigo RSA Organization Validation Secure Server CA
Issuer
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Valid from
2018-11-02T00:00:00+00:00
Expires
2030-12-31T23:59:59+00:00
Days remaining
1524
Serial (hex)
137D539CAA7C31A9A433701968847A8D
Signature
RSA-SHA384
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

72:A3:4A:C2:B4:24:AE:D3:F6:B0:B0:47:55:B8:8C:C0:27:DC:CC:80:6F:DD:B2:2B:4C:D7:C4:77:73:97:3E:C0
Certificate extensions & PEM
authorityKeyIdentifier
53:79:BF:5A:AA:2B:4A:CF:54:80:E1:D8:9B:C0:9D:F2:B2:03:66:CB
subjectKeyIdentifier
17:D9:D6:25:27:67:F9:31:C2:49:43:D9:30:36:44:8C:6C:A9:4F:EB
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: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.usertrust.com/USERTrustRSACertificationAuthority.crl
authorityInfoAccess
CA Issuers - URI:http://crt.usertrust.com/USERTrustRSAAddTrustCA.crt OCSP - URI:http://ocsp.usertrust.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
4099
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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-----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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