kalendar.nic.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:61:46:c7:f5:38:26:11:2d:71:b1:1c:14:e8:21:3c:20:74 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=kalendar.nic.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:61:46:c7:f5:38:26:11:2d:71:b1:1c:14:e8:21:3c:20:74Serial Number (int): 294438331587030474629794316732985677455476
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 6a:d2:97:2a:58:0c:64:ec:93:4e:01:f4:40:c6:ac:24:aa:b3:1b:53
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 8a:d9:4d:5f:7b:8b:64:61:e4:30:28:9a:62:51:df:cd:0b:33:8f:05
Fingerprint (sha256): 09:3e:3d:99:88:99:65:f8:61:49:e4:f4:85:8d:11:de:0c:22:71:c9:ed:84:83:72:2e:bf:a3:c3:b9:2f:b9:af
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate kalendar.nic.cz
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for kalendar.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
8 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
calendar.nic.cz
kalendar.nic.cz
kalendar.nic.cz
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Certificate
The complete raw certificate details for kalendar.nic.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGEjCCBPqgAwIBAgISA2FGx/U4JhEtcbEcFOghPCB0MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xNzEyMTkxMzAxMDBaFw0x ODAzMTkxMzAxMDBaMBoxGDAWBgNVBAMTD2thbGVuZGFyLm5pYy5jejCCAiIwDQYJ KoZIhvcNAQEBBQADggIPADCCAgoCggIBAKUc5u563CLZojh45gvq2eAGR7TZXOv8 Bigd8AAKVoO/cIe2X9BxBEwG8Bb8T+xeZ8/PlcP9/ujwnGPDbrA4XmWpTXdqx8no KwQkG+Kmmj5IvO50a25/v4nMLLhh2LR7tv7MzAjdMnuZQH7GgKMoSrKMLg2YF2Xd Pt/Jg2qXnTx3f7xLn/sbKxD2tb07b1OoBmeiDMF3iFTwOQ8ETREOKqGyIDX2RFPm tjQYMN4s4kUplK/7Au3nnmc6Rn1rUcwaBNEUvrMjccOe/HNCX3POZh1naC4TL+Pk eGoufa3+RCkaFRGQEq8rlzCoPiQ3URagOZhrQqBhSgYDKKMMt/m2OXPKZq6vyJzm kaur6r/rmMaPffvSs8vzsOAWnPKjlcB+Luy7Ha4JhhIqqny4/XldqhqSS8bS+NQ3 I1VnEXObzu4XmDjjSDFQW4qGRYMpWwiwXffgRGz0Ho8oOR2aknBKCgtgRAdWrImR mbrBOX3XriaWH+HncBiL1iAmgfHy3UPI68e1WyREl59E2wgjve/52WsoM8sreDUI 7mDBJxjOgDnG2Y2cPu6L26EALmVUzkc9HDMv+3HzuorsnIdi7OIs4qH9umRq1mBz XdrDD82nTpXqzjNl2xpBBrcngpFT0YeblyvWFgfCE51KT0a08LOj3jgSrMipRWIi G3U/zm3oezebAgMBAAGjggIgMIICHDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFGrS lypYDGTsk04B9EDGrCSqsxtTMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/z qOyhMG8GCCsGAQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50 LXgzLmxldHNlbmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50 LXgzLmxldHNlbmNyeXB0Lm9yZy8wKwYDVR0RBCQwIoIPY2FsZW5kYXIubmljLmN6 gg9rYWxlbmRhci5uaWMuY3owgf4GA1UdIASB9jCB8zAIBgZngQwBAgEwgeYGCysG AQQBgt8TAQEBMIHWMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0 Lm9yZzCBqwYIKwYBBQUHAgIwgZ4MgZtUaGlzIENlcnRpZmljYXRlIG1heSBvbmx5 IGJlIHJlbGllZCB1cG9uIGJ5IFJlbHlpbmcgUGFydGllcyBhbmQgb25seSBpbiBh Y2NvcmRhbmNlIHdpdGggdGhlIENlcnRpZmljYXRlIFBvbGljeSBmb3VuZCBhdCBo dHRwczovL2xldHNlbmNyeXB0Lm9yZy9yZXBvc2l0b3J5LzANBgkqhkiG9w0BAQsF AAOCAQEATnVVcw01TnjxwOkjutcw5gncm0EHq5ykEEhlv6XmKiQsxcLUNLz57Wd4 KZyfux75kQHwGAhVADvrd4mmjcI8NenW/jnR6OgIAfJjSGXxqiqcDPo6FPzCfnZu m+GBZSXABYrW5gTrq3XX8T5dL1ThDuthznhL9wsiDARZIuVYRKQGXvn4tsLMciXu 2LqRhn+VfMQvZfhrE/m6u3NM9Mv3/AZiB9iLDg6uAizDaENQHrAFSN3DtSFl0Csu MI2qS4f7MqkTcCncpM9x2EbYOLXYY0WlNyjzA263yXsKa3uvwhsQJD/sgTdMR0Jw vkuMll29MDBGpXzU4BcLwjiPaNm8Mg== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEApRzm7nrcItmiOHjmC+rZ 4AZHtNlc6/wGKB3wAApWg79wh7Zf0HEETAbwFvxP7F5nz8+Vw/3+6PCcY8NusDhe ZalNd2rHyegrBCQb4qaaPki87nRrbn+/icwsuGHYtHu2/szMCN0ye5lAfsaAoyhK sowuDZgXZd0+38mDapedPHd/vEuf+xsrEPa1vTtvU6gGZ6IMwXeIVPA5DwRNEQ4q obIgNfZEU+a2NBgw3iziRSmUr/sC7eeeZzpGfWtRzBoE0RS+syNxw578c0Jfc85m HWdoLhMv4+R4ai59rf5EKRoVEZASryuXMKg+JDdRFqA5mGtCoGFKBgMoowy3+bY5 c8pmrq/InOaRq6vqv+uYxo99+9Kzy/Ow4Bac8qOVwH4u7LsdrgmGEiqqfLj9eV2q GpJLxtL41DcjVWcRc5vO7heYOONIMVBbioZFgylbCLBd9+BEbPQejyg5HZqScEoK C2BEB1asiZGZusE5fdeuJpYf4edwGIvWICaB8fLdQ8jrx7VbJESXn0TbCCO97/nZ aygzyyt4NQjuYMEnGM6AOcbZjZw+7ovboQAuZVTORz0cMy/7cfO6iuych2Ls4izi of26ZGrWYHNd2sMPzadOlerOM2XbGkEGtyeCkVPRh5uXK9YWB8ITnUpPRrTws6Pe OBKsyKlFYiIbdT/Obeh7N5sCAwEAAQ== -----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 294438331587030474629794316732985677455476 . . . . . . . . [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 2017-12-19 13:01:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-03-19 13:01:00 +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 'kalendar.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 673601857881911485060559638326632117995950088091090321311173867171694197910851736045946496861933570298622391681354512012911090876307940349628636862903863288766454316014117587028373322961653469128562504624663899196744156404731455130098534079864743349719183848789845337141132336474261458566548154024415530836276003272870757890244333635180739124107987169626884765953245914057447097334014691309342055014293300401013251896293312290383598943563138506925791272805615764282975847915034996155473782988319698161987502020085841375391530267389091089428550406849732058546677493826819435348120269093737473134823329611838793113587253775762338424054132071144966080270222561972964665201126713949513392878354443026142857120298040025911528576055703052843400167607530633611416038445980084291910497525826232461500845924617872307355618905529708903062303425752801063291207635534084238551702693392031827385120165708405334245246390955582793211887818413657560534123712941809298251793266890012080691342264893944715304116672491764531751549761094885036207490293570587417192950650028808811460816247894963553208087272423037972170155134501849608626510229390927604270622128626377352288123547696114866832562222774551455858289858566413964154446633567624678759426897819 . . . . . . . . . . . . . . . . . . . . [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) 6ad2972a580c64ec934e01f440c6ac24aab31b53 . . . . . . . . . . . . . . . . [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 (36 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'calendar.nic.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kalendar.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 (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 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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