caravan-elements.de
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:72:c0:1b:c2:36:cc:00:be:78:08:4f:0b:a7:43:b0:0b:8d was issued on by Let's Encrypt.
With 6 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=caravan-elements.de
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:72:c0:1b:c2:36:cc:00:be:78:08:4f:0b:a7:43:b0:0b:8dSerial Number (int): 387496689462362775434925535150331141294989
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: b2:a1:5a:32:6f:93:c5:60:a5:40:ca:96:a0:72:77:8d:db:59:8a:bc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): a6:89:fb:a5:7c:82:d4:34:3a:b0:17:3e:d6:03:7c:63:6b:61:e4:c7
Fingerprint (sha256): 04:d8:3e:3c:8b:84:e0:8a:61:af:cb:f6:bf:30:75:c9:2f:b4:d5:5d:b2:32:1f:e6:d8:f4:6b:24:d3:41:89:e4
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate caravan-elements.de
6
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for caravan-elements.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
caravan-elements.de
caravan.api.itool4.net
caravan.b01.itool4.net
caravan.cron.itool4.net
caravan.f01.itool4.net
www.caravan-elements.de
caravan.api.itool4.net
caravan.b01.itool4.net
caravan.cron.itool4.net
caravan.f01.itool4.net
www.caravan-elements.de
Other certificates including the domain name caravan-elements.de
(limited to 100 certificates)
Certificate
The complete raw certificate details for caravan-elements.de in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGjTCCBXWgAwIBAgISBHLAG8I2zAC+eAhPC6dDsAuNMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODExMDIwNzM5MTFaFw0x OTAxMzEwNzM5MTFaMB4xHDAaBgNVBAMTE2NhcmF2YW4tZWxlbWVudHMuZGUwggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCuRnAVq5jl2r6irzNm1apsIEFx QnDI1JH1jEdJo2AgyqxtG3wMJxCBNoNtA8Z5QS3j7rrOaHhlacmyfYxdldJDMHa/ vmEGxKBADtDGiv8UgrJnNJYVOnmT4F9iYcn2YCNOdmCZAi+2JntQz598P0ApMJFN RSUrT7kcSqatbZkK6SZub8sSYbWJqM5dE+GVQqQVqlwAMRMqBLG+NeJhyyBZZOGf VksPxXYFDaYaBxSEmBeah42e0VVKOyW8bE4KzTXFLlYMKG48w+/rwXckOh5npD+m +S0O0ugibUJ3wPuEJZSYZLFj+XioD4Wk5O8NCeUD5iQoXNNJufslyt5zrjOTAgMB AAGjggOXMIIDkzAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEG CCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFLKhWjJvk8VgpUDKlqBy d43bWYq8MB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUF BwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNy eXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNy eXB0Lm9yZy8wgZoGA1UdEQSBkjCBj4ITY2FyYXZhbi1lbGVtZW50cy5kZYIWY2Fy YXZhbi5hcGkuaXRvb2w0Lm5ldIIWY2FyYXZhbi5iMDEuaXRvb2w0Lm5ldIIXY2Fy YXZhbi5jcm9uLml0b29sNC5uZXSCFmNhcmF2YW4uZjAxLml0b29sNC5uZXSCF3d3 dy5jYXJhdmFuLWVsZW1lbnRzLmRlMIH+BgNVHSAEgfYwgfMwCAYGZ4EMAQIBMIHm BgsrBgEEAYLfEwEBATCB1jAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5j cnlwdC5vcmcwgasGCCsGAQUFBwICMIGeDIGbVGhpcyBDZXJ0aWZpY2F0ZSBtYXkg b25seSBiZSByZWxpZWQgdXBvbiBieSBSZWx5aW5nIFBhcnRpZXMgYW5kIG9ubHkg aW4gYWNjb3JkYW5jZSB3aXRoIHRoZSBDZXJ0aWZpY2F0ZSBQb2xpY3kgZm91bmQg YXQgaHR0cHM6Ly9sZXRzZW5jcnlwdC5vcmcvcmVwb3NpdG9yeS8wggEDBgorBgEE AdZ5AgQCBIH0BIHxAO8AdQBVgdTCFpA2AUrqC5tXPFPwwOQ4eHAlCBcvo6odBxPT DAAAAWbTk4QdAAAEAwBGMEQCIHv1cTQsLKiUIQfWD9EYuogREmxIZhZoXaGmebV2 oFvkAiB/5ldjeTZnLHM+kUglwuKkrWVCGzQo1NXChJ5lI0sJnQB2AGPy283oO8ws zwtyhCdXazOkjWF3j711pjixx2hUS9iNAAABZtOTg30AAAQDAEcwRQIgX3RS9dja iPs0fPhsYFrLtgL0xJGF8p/pQdLshOPFQOQCIQCgklh0FM/aaF5NcEa/dyq9LmlE ey9pTHSNyqGxMBxDiDANBgkqhkiG9w0BAQsFAAOCAQEAbbJVxc5ZoOCgTAnv0AjU s5VCKwxdoyXJiB21NRrX56MuWGQcw6WkoR4fJxndSzODn0bt8WUBo2jEGWbs2XDB ezQSzzb6sHBlP12u+UmAqpWbfkxWTQmAsOJ1TaCpNVq1R2Jf+HxJPD1qA+5LLBAD 4M1pCqtlGJHtTjdCWSMoSRr2PAZ0t4jyPYN5w+ZqFUAEQRrVvnaf53FxohVh/Jl2 0nGxxDfLo3pP6tGd2W4qdO+EWUNEMs5OlHZLgtApu4Md2CdV0BIifmKJ7E1y0rPo 7GWqSiJPpc8dGZnfb8oUGW4F3LMps2e+ZCk+cQPg6U3pycv6lYK7528vbv7YyDj4 /Q== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArkZwFauY5dq+oq8zZtWq bCBBcUJwyNSR9YxHSaNgIMqsbRt8DCcQgTaDbQPGeUEt4+66zmh4ZWnJsn2MXZXS QzB2v75hBsSgQA7Qxor/FIKyZzSWFTp5k+BfYmHJ9mAjTnZgmQIvtiZ7UM+ffD9A KTCRTUUlK0+5HEqmrW2ZCukmbm/LEmG1iajOXRPhlUKkFapcADETKgSxvjXiYcsg WWThn1ZLD8V2BQ2mGgcUhJgXmoeNntFVSjslvGxOCs01xS5WDChuPMPv68F3JDoe Z6Q/pvktDtLoIm1Cd8D7hCWUmGSxY/l4qA+FpOTvDQnlA+YkKFzTSbn7Jcrec64z kwIDAQAB -----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 387496689462362775434925535150331141294989 . . . . . . . . [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 2018-11-02 07:39:11 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-01-31 07:39:11 +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 'caravan-elements.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 22000199252954857829158370018334148957397100485673861241336604703911665041585137112845987042931704212693371972472037927799691584733210549956361586448338936021597870041634988032664610397357839702451375727336704329007866046743675450883946533755774880751458230723845171409755890716848848372589263728323734975343694232433699622238028382772050337412944877950158869396158063444585603683887238873200371196874138282639298141681799365421663114883845022369460222379022563168898853747298658511449977904146166064251243192328580970323097631731954922527003953422721457576980739348928670036028503213730998456002256841552145062704019 . . . . . . . . . . . . . . . . . . . . [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) b2a15a326f93c560a540ca96a072778ddb598abc . . . . . . . . . . . . . . . . [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 (146 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'caravan-elements.de' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'caravan.api.itool4.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'caravan.b01.itool4.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'caravan.cron.itool4.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'caravan.f01.itool4.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.caravan-elements.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 (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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef0075005581d4c2169036014aea0b9b573c53f0c0e43878702508172fa3aa1d0713d30c00000166d393841d000004030046304402207bf571342c2ca8942107d60fd118ba8811126c486616685da1a679b576a05be402207fe657637936672c733e914825c2e2a4ad65421b3428d4d5c2849e65234b099d00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d00000166d393837d000004030047304502205f7452f5d8da88fb347cf86c605acbb602f4c49185f29fe941d2ec84e3c540e4022100a092587414cfda685e4d7046bf772abd2e69447b2f694c748dcaa1b1301c4388 . . . . [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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