mirror-r-01.nic.cz
Issued by R3
About this certificate
This digital certificate with serial number 03:3c:c2:13:e6:44:b1:27:cd:ab:61:67:62:13:4b:dd:7f:32 was issued on by Let's Encrypt.
With 4 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:
- DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
- Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
- Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)
Certificate Subject
CN=mirror-r-01.nic.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:3c:c2:13:e6:44:b1:27:cd:ab:61:67:62:13:4b:dd:7f:32Serial Number (int): 282011773365756184445688512025820504358706
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: ea:22:fa:e9:35:66:90:22:e4:88:5d:59:b9:a2:67:15:9a:45:93:49
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 31:17:8f:c5:f8:11:b1:df:6f:10:05:7b:a9:a6:08:78:30:dd:de:a7
Fingerprint (sha256): 10:5d:55:c9:17:83:02:ea:27:a8:4c:84:52:1e:56:2c:b9:46:fe:fc:fa:e0:f6:3c:6e:cf:9f:fa:34:c4:fc:44
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate mirror-r-01.nic.cz
4
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for mirror-r-01.nic.cz
Public Key Algorithm
RSA
Key Size
4096
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
cz.archive.ubuntu.com
cz.releases.ubuntu.com
mirror-r-01.nic.cz
mirrors.nic.cz
cz.releases.ubuntu.com
mirror-r-01.nic.cz
mirrors.nic.cz
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Certificate
The complete raw certificate details for mirror-r-01.nic.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGLzCCBRegAwIBAgISAzzCE+ZEsSfNq2FnYhNL3X8yMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzExMjExMjAwMzFaFw0yNDAyMTkxMjAwMzBaMB0xGzAZBgNVBAMT Em1pcnJvci1yLTAxLm5pYy5jejCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoC ggIBAMMdDDIDvsBuBDR3cNk2iOku3U8L4Rc3tzrA7CB3PWyPO0lvLFD3DxHIs26g K6lcwgYN3fpt/RWF9m1pFq4pgGwns9FEEIb0U8DElury2yiTZp7k8/Jb1cS3wENH yUF8AQ4bgphVg4Itp8JJSKgESVP4r9Q0a6nUP3NQe8pzq6n7FN+nE6wvEyYDRSx7 VJO20RfucmTqZ4rmfGMBk2XxA+1or456jHpwGwpFnxtIVSyN/8vPpF0UBC8o1tl1 zN2CS6Bn/zWw7C5aPCRQm4bFVsCJmBoNmseJOspIHyqnPKRVIkL6yUm/aUAuq3Jr 0jlqyYkhFocqT1d5VEtMJcmklUL1pjvHIG0GJunFFaZfXO05QJi25ooHLZ0mVLao J0gXAv65SKHM+qbACc2imXpr5Bzqpq6fZjYLm33GOcheHbdBZd7Awpi7vUahxnNV aEoX5kyjxdakuZThQwDYbZ7OiZp4kfxpW2/GPfu8MMgaMbXrXukcMjlJSF2OkucK otbde2LNEMBF12LimUAFibd8PdBTlXJqnS8YNeHKC/d9TgUfsvM0JQDs7hfbimO3 xIawjoZ/5eNSsPJl9WgQFtlqHmYBlDQU/e4fimDgNlKM0afbj0naOxaAKyRYyjpy 7yJnrKjjzD+l8Swkj0nSgybBdVFdedINuEcqozKYQCliNkSvAgMBAAGjggJSMIIC TjAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMC MAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFOoi+uk1ZpAi5IhdWbmiZxWaRZNJMB8G A1UdIwQYMBaAFBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAh BggrBgEFBQcwAYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZo dHRwOi8vcjMuaS5sZW5jci5vcmcvMFwGA1UdEQRVMFOCFWN6LmFyY2hpdmUudWJ1 bnR1LmNvbYIWY3oucmVsZWFzZXMudWJ1bnR1LmNvbYISbWlycm9yLXItMDEubmlj LmN6gg5taXJyb3JzLm5pYy5jejATBgNVHSAEDDAKMAgGBmeBDAECATCCAQMGCisG AQQB1nkCBAIEgfQEgfEA7wB2ADtTd3U+LbmAToswWwb+QDtn2E/D9Me9AA0tcm/h +tQXAAABi/H3zjUAAAQDAEcwRQIgNjlLYF4oFXs38/XTQOdiV652pjvAfCWm/d2y 74w8rmACIQDAVQGKwL6CD0nl3/HGq5AYg6klOVGwnNe0vBT5erB87gB1AEiw42va pkc0D+VqAvqdMOscUgHLVt0sgdm7v6s52IRzAAABi/H3zi4AAAQDAEYwRAIgH32I MK5V0YUKInQOAey7gm/thyBriOPhoULsLfVzRbYCIDzVzZX3vs4yTJLhb7WBo9vf 2/XjAtsZ3hTlZ4aNdYjYMA0GCSqGSIb3DQEBCwUAA4IBAQAHT1KVOjKlad2/5XQs PO9eh4G26NYM4BfCIgih/IIZ7X6Y2fFdxPDSeRrUZYT7cE64w5jCTp39dD1hmM1E PpvZJmAMpCzUA5O5b6D65Cs5MvmZRTtEi4E/nsZHpjDH0HY6GlA3l7jZauznY7Sr yGlyjOQ+fFKZbvXN/aXESeGvNSZqn7xz5e1krqcFNc/s4Jrqu5yJJtxQDbmDr4Np e5z2kSO52l0fbBZ4/UsomVrE6DNERlMyorstt/CKVcCBy5I1pcwUOiflN60pAHV9 ZCrh7RcU1mr6IXaQa3dcMyJmqG4z5lrQbM2VZgYZjuWrb+X5sj0zRMf+PNOPF7uJ 9ZQl -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwx0MMgO+wG4ENHdw2TaI 6S7dTwvhFze3OsDsIHc9bI87SW8sUPcPEcizbqArqVzCBg3d+m39FYX2bWkWrimA bCez0UQQhvRTwMSW6vLbKJNmnuTz8lvVxLfAQ0fJQXwBDhuCmFWDgi2nwklIqARJ U/iv1DRrqdQ/c1B7ynOrqfsU36cTrC8TJgNFLHtUk7bRF+5yZOpniuZ8YwGTZfED 7WivjnqMenAbCkWfG0hVLI3/y8+kXRQELyjW2XXM3YJLoGf/NbDsLlo8JFCbhsVW wImYGg2ax4k6ykgfKqc8pFUiQvrJSb9pQC6rcmvSOWrJiSEWhypPV3lUS0wlyaSV QvWmO8cgbQYm6cUVpl9c7TlAmLbmigctnSZUtqgnSBcC/rlIocz6psAJzaKZemvk HOqmrp9mNgubfcY5yF4dt0Fl3sDCmLu9RqHGc1VoShfmTKPF1qS5lOFDANhtns6J mniR/Glbb8Y9+7wwyBoxtete6RwyOUlIXY6S5wqi1t17Ys0QwEXXYuKZQAWJt3w9 0FOVcmqdLxg14coL931OBR+y8zQlAOzuF9uKY7fEhrCOhn/l41Kw8mX1aBAW2Woe ZgGUNBT97h+KYOA2UozRp9uPSdo7FoArJFjKOnLvImesqOPMP6XxLCSPSdKDJsF1 UV150g24RyqjMphAKWI2RK8CAwEAAQ== -----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 282011773365756184445688512025820504358706 . . . . . . . . [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 'R3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-21 12:00:31 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-19 12:00:30 +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 'mirror-r-01.nic.cz' . . . . . . . . [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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 795993499610488714455465023731424172331336170446525646685172989361010732958943746316729848608143004289627026156258382294557597713670548738070984417836584486496705177445970235928671137461213348196744494097316104002191107860847823345844399113828944545653838458071404275243957276068893730960340808038450643708219884346470804414916638556868729687938045731865044773387471687323494171192844977742171566029001800900496736578077967936068269203057576838491680032207691322522791541626239466929934055164035381858390828994454685838915480496840239529000814614184086470917630927694506299254800671559487261414133153159071415598609082049792391636917355750424785907576679972481451588919025139607581262573978478617979278127316758335020762400303902796261117167075084796206567139516571397016279663604283644588653473847947015194347611262455511364767183999390910946289444540236814214400476352599908206503008093491224079063125837907928496211109450100025307652878013908786521030007009361140026488245433751791208031215687390470476977317497255568042412541493570746407386551770952984073580300329902458405936517342551278534808177533444287795028927757673179933675107332722525479040197051483419283626611363262450622357075249362880260885712162688779245064058979503 . . . . . . . . . . . . . . . . . . . . [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) ea22fae935669022e4885d59b9a267159a459349 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (85 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cz.archive.ubuntu.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cz.releases.ubuntu.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mirror-r-01.nic.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mirrors.nic.cz' . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef0076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018bf1f7ce350000040300473045022036394b605e28157b37f3f5d340e76257ae76a63bc07c25a6fdddb2ef8c3cae60022100c055018ac0be820f49e5dff1c6ab901883a9253951b09cd7b4bc14f97ab07cee00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018bf1f7ce2e000004030046304402201f7d8830ae55d1850a22740e01ecbb826fed87206b88e3e1a142ec2df57345b602203cd5cd95f7bece324c92e16fb581a3dbdfdbf5e302db19de14e567868d7588d8 . . . . [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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