suv.ai
Issued by cPanel, Inc. Certification Authority
About this certificate
This digital certificate with serial number 19:a7:b6:9d:ff:88:89:d5:b2:20:06:f9:3b:a5:6c:0c was issued on by cPanel, Inc..
With 8 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.
We have idenified some issues with this certificate:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=suv.ai
cPanel, Inc.
Organization:
cPanel, Inc.
State / Province:
TX
Locality: Houston
Country: US
Locality: Houston
Country: US
This certificate has expire since
Certificate Details
Serial Number (hex): 19:a7:b6:9d:ff:88:89:d5:b2:20:06:f9:3b:a5:6c:0cSerial Number (int): 34101517386451334702188419519753841676
Serial Number lenght: 125 bits, 16 octets
SubjectKeyId: 71:57:37:c6:7d:b4:8e:5a:da:58:17:cb:ab:70:6e:89:bf:f5:0c:5d
AuthorityKeyId: 7e:03:5a:65:41:6b:a7:7e:0a:e1:b8:9d:08:ea:1d:8e:1d:6a:c7:65
Fingerprint (sha1): 3b:35:57:de:72:82:3a:33:8e:3e:7c:aa:a1:38:7e:2b:44:d4:b7:69
Fingerprint (sha256): c2:54:17:fa:31:79:bb:ee:e3:1a:af:c3:e5:cf:f9:d4:9b:63:e0:27:d2:de:20:f2:d7:77:94:28:71:b5:4e:5e
Issuing Certificate URL: http://crt.comodoca.com/cPanelIncCertificationAuthority.crt
Revocation information
OCSP Server: http://ocsp.comodoca.comCRL Distribution Point: http://crl.comodoca.com/cPanelIncCertificationAuthority.crl
Check the revocation status for certificate suv.ai
8
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for suv.ai
Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
Key Encipherment
Extended Key Usages
Server Authentication
Client Authentication
Extensions
10 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
suv.ai
cpanel.suv.ai
mail.suv.ai
suv.ai.trouble-free.net
webdisk.suv.ai
webmail.suv.ai
www.suv.ai
www.suv.ai.trouble-free.net
cpanel.suv.ai
mail.suv.ai
suv.ai.trouble-free.net
webdisk.suv.ai
webmail.suv.ai
www.suv.ai
www.suv.ai.trouble-free.net
Other certificates including the domain name suv.ai
(limited to 100 certificates)
Certificate
The complete raw certificate details for suv.ai in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFVzCCBD+gAwIBAgIQGae2nf+IidWyIAb5O6VsDDANBgkqhkiG9w0BAQsFADBy MQswCQYDVQQGEwJVUzELMAkGA1UECBMCVFgxEDAOBgNVBAcTB0hvdXN0b24xFTAT BgNVBAoTDGNQYW5lbCwgSW5jLjEtMCsGA1UEAxMkY1BhbmVsLCBJbmMuIENlcnRp ZmljYXRpb24gQXV0aG9yaXR5MB4XDTE4MTEwNTAwMDAwMFoXDTE5MDIwMzIzNTk1 OVowETEPMA0GA1UEAxMGc3V2LmFpMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB CgKCAQEAypmUZ2bb9MAHHyMZ0O8DOo3x8mIW7ykUX3cvHAVKwdo0oLBokFqdRGov f1nrihrjIzLwYTDJqx473XYKFSXNBAkbKy9PXT9qzzaEgBasHh9yXWvo4wMPWNpl Gl159DI9ByZAkqXPdrCOxgz5VU2qKK+v6q1HsjsVfoSrwyM4wEcf16/ZOkl34L6U YxYnh8OzTyMnVNGLtHLJrAhp8VpyEjra2GZKP+JSH96jZV3DdnpL126WqVKoNFy6 zViGP1LaUKJom1Lfz8AdvdCKEt8lhIha9gN2X89p79aTnLdnY0MXQPOAXy9aVhGo rjiG+z0+5Prbbb1zuaXI2KcDvrk7xQIDAQABo4ICSDCCAkQwHwYDVR0jBBgwFoAU fgNaZUFrp34K4bidCOodjh1qx2UwHQYDVR0OBBYEFHFXN8Z9tI5a2lgXy6twbom/ 9QxdMA4GA1UdDwEB/wQEAwIFoDAMBgNVHRMBAf8EAjAAMB0GA1UdJQQWMBQGCCsG AQUFBwMBBggrBgEFBQcDAjBPBgNVHSAESDBGMDoGCysGAQQBsjEBAgI0MCswKQYI KwYBBQUHAgEWHWh0dHBzOi8vc2VjdXJlLmNvbW9kby5jb20vQ1BTMAgGBmeBDAEC ATBMBgNVHR8ERTBDMEGgP6A9hjtodHRwOi8vY3JsLmNvbW9kb2NhLmNvbS9jUGFu ZWxJbmNDZXJ0aWZpY2F0aW9uQXV0aG9yaXR5LmNybDB9BggrBgEFBQcBAQRxMG8w RwYIKwYBBQUHMAKGO2h0dHA6Ly9jcnQuY29tb2RvY2EuY29tL2NQYW5lbEluY0Nl cnRpZmljYXRpb25BdXRob3JpdHkuY3J0MCQGCCsGAQUFBzABhhhodHRwOi8vb2Nz cC5jb21vZG9jYS5jb20wEwYKKwYBBAHWeQIEAwEB/wQCBQAwgZEGA1UdEQSBiTCB hoIGc3V2LmFpgg1jcGFuZWwuc3V2LmFpggttYWlsLnN1di5haYIXc3V2LmFpLnRy b3VibGUtZnJlZS5uZXSCDndlYmRpc2suc3V2LmFpgg53ZWJtYWlsLnN1di5haYIK d3d3LnN1di5haYIbd3d3LnN1di5haS50cm91YmxlLWZyZWUubmV0MA0GCSqGSIb3 DQEBCwUAA4IBAQBc/UnhdWh+WESApdxYvBDJAyWUAqS82PMWZz+T0178GQknO+It HbIIuIQs3LHF5AzzGAub3MjMCO/8KuIVO4ZkhUyc3dgxw6VdhFkdOAnCcYYQXXzu fG1cO6CvIDo1C+VCfUGhqIrCqEOT9z5VqVT2OAgcMeMvU6Dq2HnCkreHqaNYfNnk zxLdviRBd8td5PnUSm8KmMB+PXB5XFBhG7RqBT0v+y6BwqeAxigAo0nZILtcrnEX d5vmArA+yNwbDkBDKdEzcaG1srA+vMrJ/WZQtoE80TvvvtMEBSzPKsakt+ve+wqM heLVwhDHJpbG5w4YUwMs2hXFU3PHPAfsJ0p/ -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAypmUZ2bb9MAHHyMZ0O8D Oo3x8mIW7ykUX3cvHAVKwdo0oLBokFqdRGovf1nrihrjIzLwYTDJqx473XYKFSXN BAkbKy9PXT9qzzaEgBasHh9yXWvo4wMPWNplGl159DI9ByZAkqXPdrCOxgz5VU2q KK+v6q1HsjsVfoSrwyM4wEcf16/ZOkl34L6UYxYnh8OzTyMnVNGLtHLJrAhp8Vpy Ejra2GZKP+JSH96jZV3DdnpL126WqVKoNFy6zViGP1LaUKJom1Lfz8AdvdCKEt8l hIha9gN2X89p79aTnLdnY0MXQPOAXy9aVhGorjiG+z0+5Prbbb1zuaXI2KcDvrk7 xQIDAQAB -----END PUBLIC KEY-----
ASN.1 decoded
[c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:2|t:0|true] OtherName . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2 . . . . . . . . [c:0|t:2|false] INTEGER 34101517386451334702188419519753841676 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8 (stateOrProvinceName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'TX' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Houston' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'cPanel, Inc.' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'cPanel, Inc. Certification Authority' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-11-05 00:00:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-03 23:59:59 +0000 UTC . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'suv.ai' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption) . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 25575870577194294327559035342199754641272797826172907301131665081224305588069967001858400068250611095149082215078683290483912302594647284703499265743468979476462618363384182372030397275434178561963287706636816936060912963359015351296020593874720750766830243416762060890014786759753217136341935658576264424171363882067763929457659384264898188392622347231102969371829927297860739608667086203771294350050462599202475147575583505648510167038774022724181501157622510468055879992880681223026020841926547192670612125098945885672022314059076270704966514824970422929725617098426821864128141349931995946547219813892975910009797 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537 . . . . . . . . [c:2|t:3|true] ORAddress . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 7e035a65416ba77e0ae1b89d08ea1d8e1d6ac765 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 715737c67db48e5ada5817cbab706e89bff50c5d . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits) 05a0 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (72 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'https://secure.comodo.com/CPS' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31 (cRLDistributionPoints) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (69 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.comodoca.com/cPanelIncCertificationAuthority.crl' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (113 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crt.comodoca.com/cPanelIncCertificationAuthority.crt' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.comodoca.com' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.3 (CT Precertificate Poison) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (137 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'suv.ai' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpanel.suv.ai' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.suv.ai' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'suv.ai.trouble-free.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webdisk.suv.ai' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.suv.ai' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.suv.ai' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.suv.ai.trouble-free.net' . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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