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

kier.re.kr · 203.241.220.102:443

Verified

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

Subject
C=KR ST=Daejeon L=Yuseong-gu O=Korea Institute of Energy Research CN=*.kier.re.kr
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=Thawte TLS RSA CA G1
Valid from
2026-01-28T00:00:00+00:00
Expires
2027-02-23T23:59:59+00:00
Days remaining
136
Serial (hex)
0CDC1D819FD81F23CFFD50114E0203A5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.kier.re.kr, DNS:kier.re.kr

SHA-256 fingerprint

74:C2:2A:D2:A5:03:65:60:DB:00:89:75:3D:0A:59:02:33:B8:10:5C:D8:CE:05:18:F6:35:B9:D8:8B:73:1B:2C
Certificate extensions & PEM
authorityKeyIdentifier
A5:8C:FE:32:CC:EB:0F:2C:D4:19:C6:08:B8:00:24:88:5D:C3:C5:B7
subjectKeyIdentifier
2B:AA:E3:6A:4D:A9:CF:56:FE:65:E6:86:8C:CD:66:4B:5E:D8:B3:F0
subjectAltName
DNS:*.kier.re.kr, DNS:kier.re.kr
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://cdp.thawte.com/ThawteTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.thawte.com CA Issuers - URI:http://cacerts.thawte.com/ThawteTLSRSACAG1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Jan 28 07:28:01.312 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:FC:62:FE:B6:95:86:93:11:61:A9:60: 62:30:E1:A9:D1:65:89:25:6A:49:ED:58:75:D5:E4:2C: 9C:43:35:BF:EC:02:20:6C:D8:20:E7:B3:B1:71:4B:29: 13:04:ED:B6:72:59:FF:F1:15:42:16:72:6E:49:B6:B9: 3B:4E:08:1B:7E:96:7E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Jan 28 07:28:01.281 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:CD:46:F9:B3:D8:A1:27:EF:4B:1F:64: E1:D0:8B:1C:4A:48:F7:3E:44:DD:1D:13:E0:2E:A6:5D: 21:88:A0:FE:51:02:20:59:E0:03:4F:E8:17:35:DF:8D: 4B:6B:76:C2:DC:A3:A9:75:8C:CA:A2:D3:BC:FA:AA:17: D8:8E:37:B2:A7:6F:C2 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 28 07:28:01.490 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:E9:F1:08:08:BE:1A:9B:FF:8B:E9:79: F8:5D:2B:F5:10:47:55:65:AD:30:79:9C:E5:C0:B4:10: 69:C9:C7:2F:05:02:21:00:EE:93:D7:01:AA:86:77:76: 11:95:D5:45:11:E0:EA:D0:D8:21:92:9C:05:34:05:C6: 79:C9:03:D7:F5:52:45:A9
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-10T12:03:38+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=Thawte TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:24:25+00:00
Expires
2027-11-02T12:24:25+00:00
Days remaining
388
Serial (hex)
090EE8C5DE5BFA62D2AE2FF7097C4857
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4B:CC:5E:23:4F:E8:1E:DE:4E:AF:88:3A:A1:9C:31:33:5B:0B:26:E8:5E:06:6B:99:45:E4:CB:61:53:EB:20:C2
Certificate extensions & PEM
subjectKeyIdentifier
A5:8C:FE:32:CC:EB:0F:2C:D4:19:C6:08:B8:00:24:88:5D:C3:C5:B7
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.digicert.com/CPS
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2013-08-01T12:00:00+00:00
Expires
2038-01-15T12:00:00+00:00
Days remaining
4114
Serial (hex)
033AF1E6A711A9A0BB2864B11D09FAE5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CB:3C:CB:B7:60:31:E5:E0:13:8F:8D:D3:9A:23:F9:DE:47:FF:C3:5E:43:C1:14:4C:EA:27:D4:6A:5A:B1:CB:5F
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
subjectKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
-----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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