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

foxmail.com · 175.178.31.185:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`mail.qq.com' did not match expected CN=`foxmail.com'

Certificate verification failed

Subject
C=CN ST=Guangdong Province L=Shenzhen O=Tencent Technology (Shenzhen) Company Limited CN=mail.qq.com
Issuer
C=US O=DigiCert, Inc. CN=DigiCert Secure Site OV G2 TLS CN RSA4096 SHA256 2022 CA1
Valid from
2026-08-27T00:00:00+00:00
Expires
2027-03-13T23:59:59+00:00
Days remaining
172
Serial (hex)
0EF158E2436507127DB8496303D3E016
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:mail.qq.com, DNS:*.foxmail.com, DNS:*.mail.qq.com, DNS:*.qmail.com, DNS:boss.exmailgz.com, DNS:caldav.wecom.work, DNS:datacollect.foxmail.com.cn, DNS:dav.exmail.qq.com, DNS:open.exmail.qq.com, DNS:rescdn.qqmail.com, DNS:rtx.tencent.com, DNS:service.exmail.qq.com, DNS:short.open.wecall.qq.com, DNS:snip.qq.com, DNS:*.exmail.qq.com, DNS:*.exmailgz.com, DNS:*.rdgz.org, DNS:*.rtxapp.com, DNS:*.wecom.work, DNS:*.weixin.qq.com, DNS:bqq.tencent.com, DNS:webrtxfile.tencent.com

SHA-256 fingerprint

DA:ED:27:71:0B:3F:46:30:49:EF:7C:05:48:28:7A:4D:44:51:C7:72:A0:B5:C4:32:CE:BC:13:CB:11:1E:5F:80
Certificate extensions & PEM
authorityKeyIdentifier
2B:23:16:81:1B:47:89:8A:90:7A:EC:E8:32:D4:6C:8E:72:F9:CE:25
subjectKeyIdentifier
40:9C:66:9E:1D:D7:32:38:17:EE:D7:60:AA:9C:41:8B:69:40:14:53
subjectAltName
DNS:mail.qq.com, DNS:*.foxmail.com, DNS:*.mail.qq.com, DNS:*.qmail.com, DNS:boss.exmailgz.com, DNS:caldav.wecom.work, DNS:datacollect.foxmail.com.cn, DNS:dav.exmail.qq.com, DNS:open.exmail.qq.com, DNS:rescdn.qqmail.com, DNS:rtx.tencent.com, DNS:service.exmail.qq.com, DNS:short.open.wecall.qq.com, DNS:snip.qq.com, DNS:*.exmail.qq.com, DNS:*.exmailgz.com, DNS:*.rdgz.org, DNS:*.rtxapp.com, DNS:*.wecom.work, DNS:*.weixin.qq.com, DNS:bqq.tencent.com, DNS:webrtxfile.tencent.com
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/DigiCertSecureSiteOVG2TLSCNRSA4096SHA2562022CA1.crl
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.cn CA Issuers - URI:http://cacerts.digicert.cn/DigiCertSecureSiteOVG2TLSCNRSA4096SHA2562022CA1.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 : Aug 27 06:45:41.054 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4C:76:78:C3:DB:C1:BC:9A:3D:3A:70:80: 05:48:C7:73:29:96:15:63:7C:25:45:2D:F1:40:DB:2F: 96:F2:2D:75:02:20:29:F4:BB:77:04:A6:6C:D4:C1:F8: 17:E7:30:F9:89:30:E7:7C:7B:EB:88:0C:55:28:09:F4: DE:CB:A2:D3:34:87 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Aug 27 06:45:41.092 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:5C:9E:50:EF:E9:C2:70:B3:CE:6C:7C:6C: A6:49:C4:B4:47:F5:1C:77:F5:F3:6B:D0:9F:0B:99:EE: C4:01:1C:A1:02:20:1C:8B:86:2A:0F:C3:8C:FB:16:BA: 92:7C:79:1C:0A:14:96:8C:B3:84:E1:9B:E0:30:82:68: 5A:D3:0A:C0:A8:A1 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 : Aug 27 06:45:41.220 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:0A:A7:57:06:24:DF:22:09:8F:D6:55:92: 41:75:09:84:63:FD:6E:A7:20:76:97:6B:43:CB:7F:75: F1:0D:AE:CE:02:21:00:BF:C9:46:CD:03:72:20:64:B7: 11:5B:FF:74:0F:65:C1:4F:A6:C2:6C:3C:F7:EF:27:33: 51:EB:B7:2C:80:90:82
-----BEGIN CERTIFICATE-----
MIIJSzCCBzOgAwIBAgIQDvFY4kNlBxJ9uEljA9PgFjANBgkqhkiG9w0BAQsFADBq
MQswCQYDVQQGEwJVUzEXMBUGA1UEChMORGlnaUNlcnQsIEluYy4xQjBABgNVBAMT
OURpZ2lDZXJ0IFNlY3VyZSBTaXRlIE9WIEcyIFRMUyBDTiBSU0E0MDk2IFNIQTI1
NiAyMDIyIENBMTAeFw0yNjA4MjcwMDAwMDBaFw0yNzAzMTMyMzU5NTlaMIGLMQsw
CQYDVQQGEwJDTjEbMBkGA1UECBMSR3Vhbmdkb25nIFByb3ZpbmNlMREwDwYDVQQH
EwhTaGVuemhlbjE2MDQGA1UEChMtVGVuY2VudCBUZWNobm9sb2d5IChTaGVuemhl
bikgQ29tcGFueSBMaW1pdGVkMRQwEgYDVQQDEwttYWlsLnFxLmNvbTCCASIwDQYJ
KoZIhvcNAQEBBQADggEPADCCAQoCggEBAOHv5aUDyK0+k4SjhDexLWSRGp59/pGF
0wCFNgduoRRXlZ7ec2ldLfD5EYlBimdsnvX0QipoEXq9ydH9aj/wLqEZ/5T/1xRY
YW9Y5zqq69SigDDJA0DBU1u1/OmA2qhSDs1ZP18QGWU32FVrk/t/CUSpbmYyKoMJ
VK4VHpaoOt7YKW0pqxss6ynYYDxbGVOMr2Oln30eKptPe+fJuGEsgJsRSrFWZzo7
YQZ3ffbdZ4E0I1bbhC3LUFwxnMK22iCI//kU4D5kgmZbbK0sPVU0ixLEYklz3X57
XPmJ9Msn8LVauc6wiGT7ZhDtW/aXZ9RcttENuS/JHtxa+8CrpL8K8H8CAwEAAaOC
BMkwggTFMB8GA1UdIwQYMBaAFCsjFoEbR4mKkHrs6DLUbI5y+c4lMB0GA1UdDgQW
BBRAnGaeHdcyOBfu12CqnEGLaUAUUzCCAZMGA1UdEQSCAYowggGGggttYWlsLnFx
LmNvbYINKi5mb3htYWlsLmNvbYINKi5tYWlsLnFxLmNvbYILKi5xbWFpbC5jb22C
EWJvc3MuZXhtYWlsZ3ouY29tghFjYWxkYXYud2Vjb20ud29ya4IaZGF0YWNvbGxl
Y3QuZm94bWFpbC5jb20uY26CEWRhdi5leG1haWwucXEuY29tghJvcGVuLmV4bWFp
bC5xcS5jb22CEXJlc2Nkbi5xcW1haWwuY29tgg9ydHgudGVuY2VudC5jb22CFXNl
cnZpY2UuZXhtYWlsLnFxLmNvbYIYc2hvcnQub3Blbi53ZWNhbGwucXEuY29tggtz
bmlwLnFxLmNvbYIPKi5leG1haWwucXEuY29tgg4qLmV4bWFpbGd6LmNvbYIKKi5y
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A1UdIAQ3MDUwMwYGZ4EMAQICMCkwJwYIKwYBBQUHAgEWG2h0dHA6Ly93d3cuZGln
aWNlcnQuY29tL0NQUzAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUH
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NTYyMDIyQ0ExLmNydDAMBgNVHRMBAf8EAjAAMIIBfAYKKwYBBAHWeQIEAgSCAWwE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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-09-22T15:12:13+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert, Inc. CN=DigiCert Secure Site OV 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
2275
Serial (hex)
04C1B960191FCABEDCDA9301A6CD78C3
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

7C:D6:CD:D2:5E:EE:25:12:AA:F1:41:9A:FD:44:C1:46:C4:3A:A1:09:3D:5A:60:D4:ED:39:EF:BD:DA:81:5A:D4
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
2B:23:16:81:1B:47:89:8A:90:7A:EC:E8:32:D4:6C:8E:72:F9:CE:25
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-----

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

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