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

gdxc.net.cn · 223.223.205.231:443

Verified

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

Subject
C=CN ST=北京市 O=北京光电新创通信技术有限公司 CN=gdxc.net.cn
Issuer
C=US O=DigiCert, Inc. CN=GeoTrust G2 TLS CN RSA4096 SHA256 2022 CA1
Valid from
2026-02-02T00:00:00+00:00
Expires
2027-02-04T23:59:59+00:00
Days remaining
116
Serial (hex)
0AAAD201968BE7588F29359DE1F771F1
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:gdxc.net.cn, DNS:www.gdxc.net.cn

SHA-256 fingerprint

FE:7B:42:2F:98:99:28:5B:69:2F:82:44:FB:85:48:FD:4C:EA:84:33:B5:28:BC:4A:8C:45:73:35:51:B5:47:CE
Certificate extensions & PEM
authorityKeyIdentifier
41:4E:8E:69:9D:F4:6E:25:EC:78:14:1C:7E:D7:CD:1D:99:CF:F9:6B
subjectKeyIdentifier
36:83:EC:18:4B:D0:14:5C:81:20:90:5C:82:9B:9C:AE:AE:A3:9C:F9
subjectAltName
DNS:gdxc.net.cn, DNS:www.gdxc.net.cn
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://crl.digicert.cn/GeoTrustG2TLSCNRSA4096SHA2562022CA1.crl
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.cn CA Issuers - URI:http://cacerts.digicert.cn/GeoTrustG2TLSCNRSA4096SHA2562022CA1.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 : Feb 2 01:45:35.103 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:29:47:65:45:63:97:29:8B:06:90:A0:40: 42:BD:05:42:5F:1D:38:AC:68:F9:A1:04:7D:A8:68:8A: DC:BA:66:72:02:20:52:2C:66:64:CF:F7:14:7F:10:03: 05:56:EB:0B:F1:1D:97:D0:DF:0A:0A:39:8E:E7:E5:CF: E2:46:93:12:E5:26 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 : Feb 2 01:45:35.148 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:15:3C:98:48:D2:CB:07:23:45:8C:DE:7C: E5:56:CA:9D:EA:8C:E2:47:AE:BE:A2:37:58:81:15:6A: 73:5D:45:95:02:21:00:D6:10:07:04:45:F7:11:2A:C6: 1C:E1:6F:A6:3E:3A:5C:72:A9:9A:B7:F6:E9:7D:9F:53: AB:7F:B6:F2:3F:0C:E0 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 : Feb 2 01:45:35.185 2026 GMT Extensions: 00:00:05:00:02:32:23:62 Signature : ecdsa-with-SHA256 30:44:02:20:42:10:B0:C3:A4:F5:C6:40:9B:20:F2:B3: 6C:40:76:06:FB:CF:74:43:0F:76:A9:CA:07:83:14:BA: 34:E8:4F:70:02:20:64:91:9E:05:B1:4A:FE:E0:E2:9D: 24:51:85:27:37:38:67:F5:83:E9:56:29:A8:5D:20:54: BE:1F:8B:CD:56:B3
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-11T18:01:52+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=DigiCert, Inc. CN=GeoTrust G2 TLS CN RSA4096 SHA256 2022 CA1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2022-12-15T00:00:00+00:00
Expires
2032-12-14T23:59:59+00:00
Days remaining
2256
Serial (hex)
0F06BB09306148267FCA1B71C1DB807D
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

05:DC:9E:DC:0F:DD:FA:97:5A:14:32:EF:80:6E:C7:80:07:8B:53:62:AD:45:AF:76:DB:15:C9:07:63:0D:B2:5D
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
41:4E:8E:69:9D:F4:6E:25:EC:78:14:1C:7E:D7:CD:1D:99:CF:F9:6B
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
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.cn CA Issuers - URI:http://cacerts.digicert.cn/DigiCertGlobalRootG2.crt
crlDistributionPoints
Full Name: URI:http://crl.digicert.cn/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.2.1 Policy: 2.23.140.1.1 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2 Policy: 2.23.140.1.2.3
-----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 CA
Valid from
2024-01-18T00:00:00+00:00
Expires
2031-11-09T23:59:59+00:00
Days remaining
1855
Serial (hex)
0FE032AB844D033106C50C8E13C8B068
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

79:D5:7B:15:DF:A6:5C:28:70:EA:FE:11:B6:37:76:59:09:CF:E9:37:B4:9C:15:CE:7F:19:40:30:CA:B3:95:AD
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
authorityKeyIdentifier
03:DE:50:35:56:D1:4C:BB:66:F0:A3:E2:1B:1B:C3:97:B2:3D:D1:55
keyUsage
Digital Signature, Certificate Sign, CRL Sign
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.cn CA Issuers - URI:http://cacerts.digicert.cn/DigiCertGlobalRootCA.crt
crlDistributionPoints
Full Name: URI:http://crl.digicert.cn/DigiCertGlobalRootCA.crl
certificatePolicies
Policy: X509v3 Any Policy
-----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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