www.wlstkd.com
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:7e:c8:e4:38:a9:0c:87:4d:8e:cd:c0:e9:6f:24:39:f2:e4 was issued on by Let's Encrypt.
With 2 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=www.wlstkd.com
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:7e:c8:e4:38:a9:0c:87:4d:8e:cd:c0:e9:6f:24:39:f2:e4Serial Number (int): 304479466619368090112301169265404494344932
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 09:83:38:4e:28:28:18:c6:e4:9c:bc:e7:99:68:b7:b3:4b:67:ea:ca
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 59:8b:03:1f:ba:e8:ae:bc:db:3d:03:e9:bf:a6:92:4d:ab:cd:95:ce
Fingerprint (sha256): a4:2a:89:2b:b3:f5:11:e8:3c:9a:a1:d3:68:97:11:2c:ed:32:dd:9f:88:b7:d8:82:45:2f:d7:5e:81:d6:bd:71
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.wlstkd.com
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.wlstkd.com
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
9 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
wlstkd.com
www.wlstkd.com
www.wlstkd.com
Other certificates including the domain name wlstkd.com
(limited to 100 certificates)
www.wlstkd.com
www.wlstkd.com
www.wlstkd.com
forms.oscar-coach.com
www.wlstkd.com
wlstkd.com
wlstkd.com
wlstkd.com
www.wlstkd.com
wlstkd.com
wlstkd.com
www.wlstkd.com
forms.wlstkd.com
forms.oscar-coach.com
wlstkd.com
wlstkd.com
wlstkd.com
www.wlstkd.com
www.wlstkd.com
wlstkd.com
www.wlstkd.com
wlstkd.com
www.wlstkd.com
wlstkd.com
wlstkd.com
wlstkd.com
wlstkd.com
www.wlstkd.com
www.wlstkd.com
forms.oscar-coach.com
www.wlstkd.com
wlstkd.com
wlstkd.com
wlstkd.com
www.wlstkd.com
wlstkd.com
wlstkd.com
www.wlstkd.com
forms.wlstkd.com
forms.oscar-coach.com
wlstkd.com
wlstkd.com
wlstkd.com
www.wlstkd.com
www.wlstkd.com
wlstkd.com
www.wlstkd.com
wlstkd.com
www.wlstkd.com
wlstkd.com
wlstkd.com
wlstkd.com
wlstkd.com
Certificate
The complete raw certificate details for www.wlstkd.com in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGEzCCBPugAwIBAgISA37I5DipDIdNjs3A6W8kOfLkMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODA0MjExNTM4MTVaFw0x ODA3MjAxNTM4MTVaMBkxFzAVBgNVBAMTDnd3dy53bHN0a2QuY29tMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArdUpTI274FSGM/uGvSkpXfsaTLEop+OY 745ORU3jtRFBQDPETHiIgFMo3fiPGeWIASZpC0cGzKDq6USXY0CB1QMLDgKdAvvB /29YEUZYN0uWNi51R+JB6Oxft2GETJM/o6KyrKoI47jTFZ7ZLv9yLRdO++M7KHjI JWW73I00bS/FEwBA3x7aDoCfuUFT/Y11AHjxu6hYnTdSpHxLWyS3Yh1UDfdmZi7f 0LHKB7mdquEuRbLRKake7GZMqDEimtiT0Sm9ZyXwnXi2KY4vQBoEd1sWUDcEk9JF U+c0arW237DdDXTVxW0AIoLGhrfwdr2ngo/6ulmKwdQzqhIv2HHOnQIDAQABo4ID IjCCAx4wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF BQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBQJgzhOKCgYxuScvOeZaLezS2fq yjAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRj MGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5v cmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5v cmcvMCUGA1UdEQQeMByCCndsc3RrZC5jb22CDnd3dy53bHN0a2QuY29tMIH+BgNV HSAEgfYwgfMwCAYGZ4EMAQIBMIHmBgsrBgEEAYLfEwEBATCB1jAmBggrBgEFBQcC ARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwgasGCCsGAQUFBwICMIGeDIGb VGhpcyBDZXJ0aWZpY2F0ZSBtYXkgb25seSBiZSByZWxpZWQgdXBvbiBieSBSZWx5 aW5nIFBhcnRpZXMgYW5kIG9ubHkgaW4gYWNjb3JkYW5jZSB3aXRoIHRoZSBDZXJ0 aWZpY2F0ZSBQb2xpY3kgZm91bmQgYXQgaHR0cHM6Ly9sZXRzZW5jcnlwdC5vcmcv cmVwb3NpdG9yeS8wggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdgDbdK/uyynssf7K PnFtLOW5qrs294Rxg8ddnU83th+/ZAAAAWLpEgUVAAAEAwBHMEUCIQDmgaZJv+4d 4spBosA80Bs2Chs3L1LtfhIv8aHVWaJ8CgIgTnOb0B7EBbnQP56Z8+HAj8/ieWS7 B4BXDYcNy3RrvKYAdgApPFGWVMg5ZbqqUPxYB9S3b79Yeily3KTDDPTlRUf0eAAA AWLpEgU8AAAEAwBHMEUCIGt+reLAqf++doTGqoKbKB4TAIpKpGe0EvuKHfYMKp6V AiEA+rB5I7tpQERbTYazY01YoIBorkJG8kbMLmlB3cK1aygwDQYJKoZIhvcNAQEL BQADggEBAHcMjjaxzkHmfZfKPwsFZmK+srn+gWmCw++3wcqzbGqbIw4L8NCptp9G 8cVkJG6I6QRYU1VVkSBCgEObyvV+AJch1UNCst3dG/mDfDWuCV2iYAtkgRNKswiO XwigrjKEWJzrLMq6NEEAgkE/+WzUHzhUUvxsjtm3KNNF4c2P3rRj7W6XZrNulYGV XmzBkC/ZpGHXSv+W1+hZ9iNJSVq/CxngNvc4eA5GiLWs/rr//nZ/c1gjuzmXJMF3 MGJB/Yc+bi+hzD4lnH+a9FqDkF8ZopRsPVEqlHhto1yDF5jw2iMta/tQyZ6dwEtE DPJx3wq8B89Yhv7vD7m+DgDYXb/Wobk= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArdUpTI274FSGM/uGvSkp XfsaTLEop+OY745ORU3jtRFBQDPETHiIgFMo3fiPGeWIASZpC0cGzKDq6USXY0CB 1QMLDgKdAvvB/29YEUZYN0uWNi51R+JB6Oxft2GETJM/o6KyrKoI47jTFZ7ZLv9y LRdO++M7KHjIJWW73I00bS/FEwBA3x7aDoCfuUFT/Y11AHjxu6hYnTdSpHxLWyS3 Yh1UDfdmZi7f0LHKB7mdquEuRbLRKake7GZMqDEimtiT0Sm9ZyXwnXi2KY4vQBoE d1sWUDcEk9JFU+c0arW237DdDXTVxW0AIoLGhrfwdr2ngo/6ulmKwdQzqhIv2HHO nQIDAQAB -----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 304479466619368090112301169265404494344932 . . . . . . . . [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 2.5.4.10 (organizationName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt' . . . . . . . . . . . . [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 'Let's Encrypt Authority X3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-04-21 15:38:15 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-07-20 15:38:15 +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 'www.wlstkd.com' . . . . . . . . [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 21944340525816734962448864773216671328304414598607256805579209407987627410797350736875532867200166613260729174346383093971358831206491587409873119948543749234330703921743687011841602381863965913497932681405582255374422779216520855794637758592102015118482471394697321874180892943752330588768359319767150851565674194323016043642433367516284235168869773013227953142502809295835126522499370232627325853383588367174422389552115077284832957509427654487570330544732539595813635885032617888765814941346677278228275460291446135725171944095917339759525199305290091654091043207280703011869932373518957308918827199801471840407197 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.15 (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 2.5.29.37 (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 2.5.29.19 (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 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 0983384e282818c6e49cbce79968b7b34b67eaca . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1 . . . . . . . . . . . . . . . . [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 (99 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.int-x3.letsencrypt.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://cert.int-x3.letsencrypt.org/' . . . . . . . . . . . . . . . . [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 (30 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wlstkd.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.wlstkd.com' . . . . . . . . . . . . . . . . [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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.44947.1.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'http://cps.letsencrypt.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007600db74afeecb29ecb1feca3e716d2ce5b9aabb36f7847183c75d9d4f37b61fbf6400000162e91205150000040300473045022100e681a649bfee1de2ca41a2c03cd01b360a1b372f52ed7e122ff1a1d559a27c0a02204e739bd01ec405b9d03f9e99f3e1c08fcfe27964bb0780570d870dcb746bbca6007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000162e912053c000004030047304502206b7eade2c0a9ffbe7684c6aa829b281e13008a4aa467b412fb8a1df60c2a9e95022100fab07923bb6940445b4d86b3634d58a08068ae4246f246cc2e6941ddc2b56b28 . . . . [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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