blog.xqueue.de
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:2c:5e:0c:7e:9f:09:ad:50:31:c5:a3:9b:de:08:bd:1f:5f 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=blog.xqueue.de
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:2c:5e:0c:7e:9f:09:ad:50:31:c5:a3:9b:de:08:bd:1f:5fSerial Number (int): 363546580178912246276709719984951642627935
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 87:b8:65:b7:e8:10:86:ca:67:ab:c4:a6:19:5b:36:49:f1:43:d3:70
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 87:05:39:1b:eb:71:ca:d9:6a:ec:03:6d:1c:52:bf:73:f9:e2:ea:c5
Fingerprint (sha256): 22:9f:5a:18:7f:dd:a7:0f:0e:d8:64:eb:d3:09:cd:f8:ce:5f:1c:fd:fd:1c:f3:00:60:7e:16:30:6a:53:f9:24
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate blog.xqueue.de
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for blog.xqueue.de
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
blog.xqueue.de
www.blog.xqueue.de
www.blog.xqueue.de
Other certificates including the domain name xqueue.de
(limited to 100 certificates)
*.fr.xqueue.de
support.xqueue.de
xqueue.de
support.xqueue.de
*.fr.xqueue.de
blog.xqueue.de
blog.xqueue.de
*.xqueue.de
blog.xqueue.de
support.xqueue.de
*.xqueue.de
xqueue.de
maileon.de
*.xqueue.de
blog.xqueue.de
*.fr.xqueue.de
*.xqueue.de
*.xqueue.de
*.xqueue.de
support.xqueue.de
maileon.de
blog.xqueue.de
xqueue.de
xqueue.de
xqueue.de
blog.xqueue.de
support.xqueue.de
xqueue.de
*.fr.xqueue.de
blog.xqueue.de
*.fr.xqueue.de
*.fr.xqueue.de
support.xqueue.de
manual.maileon.com
support.xqueue.de
support.xqueue.de
xqueue.de
xqueue.de
xqueue.de
support.xqueue.de
xqueue.de
support.xqueue.de
xqueue.de
xqueue.de
blog.xqueue.de
maileon.de
blog.xqueue.de
xqueue.de
blog.xqueue.de
support.xqueue.de
blog.xqueue.de
support.xqueue.de
xqueue.de
*.xqueue.de
*.pf.xqueue.de
xqueue.de
*.pf.xqueue.de
xqueue.de
xqueue.de
support.xqueue.de
xqueue.de
support.xqueue.de
*.fr.xqueue.de
blog.xqueue.de
blog.xqueue.de
*.xqueue.de
blog.xqueue.de
support.xqueue.de
*.xqueue.de
xqueue.de
maileon.de
*.xqueue.de
blog.xqueue.de
*.fr.xqueue.de
*.xqueue.de
*.xqueue.de
*.xqueue.de
support.xqueue.de
maileon.de
blog.xqueue.de
xqueue.de
xqueue.de
xqueue.de
blog.xqueue.de
support.xqueue.de
xqueue.de
*.fr.xqueue.de
blog.xqueue.de
*.fr.xqueue.de
*.fr.xqueue.de
support.xqueue.de
manual.maileon.com
support.xqueue.de
support.xqueue.de
xqueue.de
xqueue.de
xqueue.de
support.xqueue.de
xqueue.de
support.xqueue.de
xqueue.de
xqueue.de
blog.xqueue.de
maileon.de
blog.xqueue.de
xqueue.de
blog.xqueue.de
support.xqueue.de
blog.xqueue.de
support.xqueue.de
xqueue.de
*.xqueue.de
*.pf.xqueue.de
xqueue.de
*.pf.xqueue.de
xqueue.de
xqueue.de
Certificate
The complete raw certificate details for blog.xqueue.de in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFaDCCBFCgAwIBAgISBCxeDH6fCa1QMcWjm94IvR9fMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAxMzEyMzA1NTNaFw0y MDA0MzAyMzA1NTNaMBkxFzAVBgNVBAMTDmJsb2cueHF1ZXVlLmRlMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxOyh/SsbyqT4zDoE0JQYmziWhBvRmWEQ QS8UgzPe2gN+ZVDC6soDQ/HPwblLtirgjgVd8mC/0o32+6ORj1w0Oc4076ecKX8F WgcK0vW9KYc2F13/GzGFIgt61odHMOjQi7ECtNCAFj6YDOWDD/FXN5VjZ2b99uph 7taq+3hMysQtWrxQQ7MMkTx6r/bo17PmOE4CXiFXRWb/wq/0ArBYu4qfXoxn1uwS UCn1N67DCJ0BZHYviLrJ6VXzfHvLzb7oPlC9FYLB5LRsaXmJ6GDMcyvlE7sCLLNJ I0MGBZQXa9iwQ37ooc2q2mZCx48RtU5Y5voJ/Cq76wXYvGlZuaCm9wIDAQABo4IC dzCCAnMwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF BQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSHuGW36BCGymerxKYZWzZJ8UPT cDAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRj MGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5v cmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5v cmcvMC0GA1UdEQQmMCSCDmJsb2cueHF1ZXVlLmRlghJ3d3cuYmxvZy54cXVldWUu ZGUwTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEF BQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEEBgorBgEEAdZ5AgQC BIH1BIHyAPAAdQCyHgXMi6LNiiBOh2b5K7mKJSBna9r6cOeySVMt74uQXgAAAW/+ EXCcAAAEAwBGMEQCIBfYWCSS38Ey5zT0za5ptbaZb1hxc1ayTSV1Q9xjOC/GAiBH 0JxqiCfOxp7bQyNvuA+IO5ee8qZXg7GVB8czAPvvZAB3AG9Tdqwx8DEZ2JkApFEV /3cVHBHZAsEAKQaNsgiaN9kTAAABb/4RcNQAAAQDAEgwRgIhAN0k7Z5i3NcbIL6R I6iDcN+vpDKWwXWTtDO775pm7bbkAiEAxcMeCCMG60hBhKjVPg3jVUOh3de4B+cJ M21FigiBSm4wDQYJKoZIhvcNAQELBQADggEBAGJKHK2vhQL3+4At+SA8Ilh0WZ8B xGavc3ercpASTkvTpNZhzKN9rpZr183yu8gjrJJ5/Cauj+mgZOxfXeXtp356Gq+G 5zTxcyU90PY6MbS4lq97A+3mRVhnGfcpSNbdXHWAOezgGwZkjFmJjFbdlRr46og6 R0n52LneAYwnc5vaxmEbC8UwCOsOq2z9sgv/I63iEZiUvlfUckTQaMKtoXCx3/OM GMQ1GhQ5Vczn5T1VRfQI2Gsf0T92hpEHlxqwYS2ea/JCH6EiQY/4CjPNg8O+BybS xKlxnq/s7XftKS9h6QYD7jr7ufS8dfHIgkaz+k3U11DNHomeHTmtc364Orc= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxOyh/SsbyqT4zDoE0JQY mziWhBvRmWEQQS8UgzPe2gN+ZVDC6soDQ/HPwblLtirgjgVd8mC/0o32+6ORj1w0 Oc4076ecKX8FWgcK0vW9KYc2F13/GzGFIgt61odHMOjQi7ECtNCAFj6YDOWDD/FX N5VjZ2b99uph7taq+3hMysQtWrxQQ7MMkTx6r/bo17PmOE4CXiFXRWb/wq/0ArBY u4qfXoxn1uwSUCn1N67DCJ0BZHYviLrJ6VXzfHvLzb7oPlC9FYLB5LRsaXmJ6GDM cyvlE7sCLLNJI0MGBZQXa9iwQ37ooc2q2mZCx48RtU5Y5voJ/Cq76wXYvGlZuaCm 9wIDAQAB -----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 363546580178912246276709719984951642627935 . . . . . . . . [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 2020-01-31 23:05:53 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-30 23:05:53 +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 'blog.xqueue.de' . . . . . . . . [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 24859395740906028100131626069617744652224170834535543086786256898465810877082001963329202524936836778867971254717392772423264330220805183776534153687347503330178537727983255257749443340065774118082187146750736995773312789880525429449965201032669099258414227700045408210893512991397059377524910314430172111439648783110177252170711167450160050303241419129969370569857344969856904813554512129789812487669536152196465255638232869070725888691288258342201542242996789958968424649628761288462354471860608449975527801134989495133628011863346163290688002223062168304994035103467398752307225440516944001354970229434633928353527 . . . . . . . . . . . . . . . . . . . . [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) 87b865b7e81086ca67abc4a6195b3649f143d370 . . . . . . . . . . . . . . . . [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 (38 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'blog.xqueue.de' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.blog.xqueue.de' . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016ffe11709c0000040300463044022017d8582492dfc132e734f4cdae69b5b6996f58717356b24d257543dc63382fc6022047d09c6a8827cec69edb43236fb80f883b979ef2a65783b19507c73300fbef640077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016ffe1170d40000040300483046022100dd24ed9e62dcd71b20be9123a88370dfafa43296c17593b433bbef9a66edb6e4022100c5c31e082306eb484184a8d53e0de35543a1ddd7b807e709336d458a08814a6e . . . . [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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